Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba99f1e3b7b7901…

MALICIOUS

PDF

104.7 KB Created: 2021-03-17 07:57:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 35c2df356542a506ccb150b8c8bcf1d8 SHA-1: 813beaf727c9ed2736309e2ee89c4a6b4ede76b3 SHA-256: fba99f1e3b7b7901c37537c57173d3020177849a3ed438c8e1b1d45136225284
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://golowaki.ru/123?utm_term=ashrae+ventilation+standard+62.+1+pdf PDF link annotation
    • https://cdn.sqhk.co/rovovuroj/yjgjfZf/93802098031.pdfIn PDF document text
    • http://wafixevewitope.mypressonline.com/41080029760.pdfIn PDF document text
    • https://muwobifuf.weebly.com/uploads/1/3/4/5/134501600/3ea32ae278.pdfIn PDF document text
    • https://rofetavagamufup.weebly.com/uploads/1/3/4/3/134373504/8f1f10dce0c0c85.pdfIn PDF document text
    • https://wokopapun.weebly.com/uploads/1/3/5/3/135388848/fubudexoro.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/poxapawo_duwiwokokimon.pdfIn PDF document text
    • https://cdn.sqhk.co/nexasolonit/igJMhgY/crypto_wallet_app_download.pdfIn PDF document text
    • https://fetavagipiw.weebly.com/uploads/1/3/1/3/131380759/14eb73b52.pdfIn PDF document text
    • https://cdn.sqhk.co/zivalutapa/xi9Enie/pixovorunus.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/jhjhJha/four_color_block_puzzle.pdfIn PDF document text
    • https://paxutujuwibe.weebly.com/uploads/1/3/4/9/134904532/sogogifewis.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/56jdDjb/minecraft_epic_wooden_house_tutorial.pdfIn PDF document text
    • https://feronodi.weebly.com/uploads/1/3/0/8/130813799/3278721.pdfIn PDF document text
    • https://junezemojevav.weebly.com/uploads/1/3/2/7/132740237/3125241.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_a123c7c0af2746d6bef215ba6383d6c6.pdf?index=trueIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_cfc22e9c3a5b44c68791e97d5fbe9286.pdf?index=trueIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/what_is_usps_media_mail_rate.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_435cc3e1ecc14e7a91c2680f6f111755.pdf?index=trueIn PDF document text
    • https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_dfa112b128104e70bdba89aa3d5e6ff3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bakoloj/nefurizagudevanasez.pdfIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_a46ce70edd784505bb29eedddfea6497.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/dodoradaxuwarolegewiteduv.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/valos.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/gebadejawofuda.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/cmsimple_templates_responsive.pdfIn 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/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14425 5548 bytes
SHA-256: a874f857dbf46f9e6dcdd2a1f8a01b2dee025688aa02c1c30b09f6e8ae906a57
font_01_sfnt_off0001570f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1570F 11164 bytes
SHA-256: ca8e0303a70f3b288f31a748d026bd40481970f69ce87368e732c0b7242c1beb
font_02_sfnt_off00017d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D4D 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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