Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3f6f3529051718…

MALICIOUS

PDF

112.5 KB Created: 2022-09-12 17:50:16 +00:00 Authoring application: carawilo (via PDF Master 1.0.1) First seen: 2026-05-03
MD5: b17376ea9a9fe05aca3dad2387ea467b SHA-1: c562cfe15171ee610e7e67eaf0e896970939e464 SHA-256: 5f3f6f352905171875c1a6136c8cbdee8f6ac0e225232f17da86091ce2e5295b
304 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0014

Heuristics 9

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Cracked-software lure uses shortlink/download gateway critical PDF_CRACKED_SOFTWARE_SHORTLINK_LURE
    PDF visible text advertises a crack, serial number, archive, or pirated-software download and pairs it with a shortlink or encoded download gateway. This is a high-confidence social-engineering carrier for unwanted software or droppers; the PDF itself is not a parser exploit.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Cracked-software lure uses download-gateway redirectors high PDF_CRACKED_SOFTWARE_REDIRECTOR_LINK_FARM
    PDF contains multiple cracked-software/keygen/serial-key lure links together with long encoded download-gateway URLs or known crack-download redirector hosts. This is stronger than generic piracy vocabulary: the document is an SEO lure that funnels users through redirect/download infrastructure commonly used for adware, unwanted software, or droppers.
  • PDF links to a cracked-software download doorway (base64-obfuscated) high PDF_CRACKED_SOFTWARE_DOWNLOAD_DOORWAY
    PDF's embedded link hides a pirated-software title as a base64 blob inside the URL path/query (and/or carries the ``download|`` doorway-template marker), rather than in visible text. This is a TCPDF-generated SEO doorway that ranks for software-piracy searches and funnels users to fake 'crack/keygen' download pages distributing adware, potentially-unwanted programs, or droppers. The base64 encoding is deliberate obfuscation to evade plaintext lure rules; the PDF itself carries no parser exploit — the risk is the linked crack-download destination.
  • PDF link farm advertises cracked/pirated software medium PDF_CRACKED_SOFTWARE_LURE
    PDF contains many clickable links whose targets use cracked-software, keygen, serial-key, or warez vocabulary. These are SEO-spam lure documents that rank for software-piracy searches and route users to fake 'crack' download pages distributing potentially-unwanted programs, adware, or droppers. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://xtraserp.com/belidorm.iuma.niot.materialises.fridges?VG1wZ2VuYyBBdXRob3JpbmcgV29ya3MgNSBDcmFjayA1MDgyNiAxNAVG1=poof&wherefore=ZG93bmxvYWR8ZnI4TVdOM2NYbDhmREUyTmpJMk9EQXpPVEI4ZkRJMU9UQjhmQ2hOS1NCWGIzSmtjSEpsYzNNZ1cxaE5URkpRUXlCV01pQlFSRVpk PDF link annotation
    • http://www.giffa.ru/who/western-union-bug-software-activation-18/In PDF document text
    • https://deeprooted.life/wp-content/uploads/2022/09/Advance_Steel_2014_x64_32X64bit_Product_key_and_Xforce_keyge.pdfIn PDF document text
    • https://superstitionsar.org/kode-aktivasi-camfrog-pro-6-3-free-full-better-download-crack-21/In PDF document text
    • https://bodhibliss.org/code-denregistrement-incredimail-plus-crack-__exclusive__/In PDF document text
    • https://postlistinn.is/autodesk-inventor-2014-download-repack-crackIn PDF document text
    • https://omaamart.com/wp-content/uploads/2022/09/Avengers_Infinity_War_Comics_Pdf_NEW_Download.pdfIn PDF document text
    • http://www.b3llaphotographyblog.com/hd-online-player-efilm-workstation-3-4-crack-hot/In PDF document text
    • http://www.beacondev.club/wp-content/uploads/2022/09/Cyberghost_Premium_LINK_Crack.pdfIn PDF document text
    • https://zemsl.org/wp-content/uploads/2022/09/debhedw.pdfIn PDF document text
    • https://www.youthpassageways.org/wp-content/uploads/2022/09/kaelers.pdfIn PDF document text
    • https://cafevalentustienda.com/wp-content/uploads/2022/09/Creo_Elements_Direct_Modeling_Crack_181.pdfIn PDF document text
    • https://descargatelo.net/wp-content/uploads/2022/09/Lego_Seigneur_Des_Anneaux_Pc_Crack_Fr_EXCLUSIVE.pdfIn PDF document text
    • https://magiclifequicksell.com/wp-content/uploads/2022/09/Dobrica_Cosic_Knjiga_Pdf_Download_EXCLUSIVE.pdfIn PDF document text
    • https://projfutr.org/wp-content/uploads/2022/09/Kapetan_Dzon_Piplfoks_Prepricano_Hit.pdfIn PDF document text
    • https://jasaborsumurjakarta.com/kabhi-alvida-na-kehna-top-full-movie-hd-1080p-16In PDF document text
    • https://greenearthcannaceuticals.com/wp-content/uploads/2022/09/scorgari.pdfIn PDF document text
    • https://www.iltossicoindipendente.it/2022/09/12/daim-iqbal-daim-poetry-books/In PDF document text
    • https://heidylu.com/sound-radix-auto-align-v150-incl-keygen-r2r2r-verified/In PDF document text
    • https://bodhirajabs.com/introduccionalelectromagnetismopopoviczoya35-best/In PDF document text
    • https://sut.oribentech.com/advert/masogange-video-ya-ngono-14/In PDF document text
    • http://xtraserp.com/belidorm.iuma.niot.materialises.fridges?vg1wz2vuyybbdxrob3jpbmcgv29ya3mgnsbdcmfjaya1mdgyniaxnavg1=poof&wherefore=zg93bmxvywr8zni4tvdom2nybdhmreuytmpjmk9eqxppvei4zkrjmu9uqjhmq2hos1ncwgizsmtjsepsyznnz1cxae5urkpruxlcv01pqlfsrvpkIn PDF document text
    • http://www.tcpdf.orgIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://www.aiim.org/pdfa/ns/extension/In PDF document text
    • http://www.aiim.org/pdfa/ns/schema#In PDF document text
    • http://www.aiim.org/pdfa/ns/property#In PDF document text
    • http://www.aiim.org/pdfa/ns/id/In PDF document text
🗂 Part of campaign: secureserver.net 1471 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F0 84508 bytes
SHA-256: 2b7ba551bea82cc3307397981c1dbeb1b78486f95f2eb14e5e58d4e1b24edb0c
font_01_sfnt_off00009cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDC 83036 bytes
SHA-256: 6d13e73e85a502a13969f6a5eaecd0b275a0868c045f80b7d64ed55d70678261