Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7cfde4e68add4e0…

MALICIOUS

PDF

81.3 KB Created: 2021-03-12 00:33:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2c28437f2b2d39f8eefbe05f0f0bd440 SHA-1: 19a3649b728f2ef56975c312060dad9c330dd479 SHA-256: f7cfde4e68add4e0a8ef4297ae2dc8e644b96b83cdc1fd921439c08d6e2e21e1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/123?utm_term=wow+archeology+achievement+guide PDF link annotation
    • http://dresdenpharma.ru/kuwanojatofzxaij.pdfIn PDF document text
    • http://online-bestshop.xyz/microsoft_azure_fundamentals_training_certification_az-_900qa7i4.pdfIn PDF document text
    • https://towuzisutodugo.weebly.com/uploads/1/3/0/9/130969847/segewanomunebudi.pdfIn PDF document text
    • http://martakkord.ru/zafujajhfw5w.pdfIn PDF document text
    • http://lg-copyright.com/3316893410xdjx2.pdfIn PDF document text
    • http://reduslimer.website/46232329176f2k8t.pdfIn PDF document text
    • http://fullcreditreport.info/sportspower_12ft_trampoline_manualb6h0m.pdfIn PDF document text
    • http://purpless.vip/what_is_rogers_diffusion_of_innovation_theory1ot9r.pdfIn PDF document text
    • https://wariraxaluxar.weebly.com/uploads/1/3/3/9/133986847/9685919.pdfIn PDF document text
    • https://nuguzawopaji.weebly.com/uploads/1/3/4/0/134040365/6231366.pdfIn PDF document text
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/gaselit.pdfIn PDF document text
    • http://pollsexpert.com/how_to_connect_dish_hopper_to_ethernetkjbn9.pdfIn PDF document text
    • https://waboralitenir.weebly.com/uploads/1/3/4/5/134504299/pudera_gubavomukufano_rijunolopixew.pdfIn PDF document text
    • http://dkblogin-de.best/jolisuxavugologemafiz883tb.pdfIn PDF document text
    • http://draiwenstore.online/18969308227ey0g4.pdfIn PDF document text
    • http://magnifioco.site/3149564502mscm8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b05bf5af-fd95-4178-86ac-2e31505d68a8/2_nephi_15_20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3482939-e4ba-4e69-8642-f50c06cb200f/46674858332.pdfIn PDF document text
    • http://pikejip.rf.gd/suxofixawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4da6519-7b76-422e-8605-948b9805c39c/jizasirimob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76f8b86-065b-4f8a-9cb6-25b52c938fc7/gisapul.pdfIn PDF document text
    • http://rexamif.epizy.com/autocad_3d_design_tutorial.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF398 5324 bytes
SHA-256: 77df5b443d102bf29c041d162537c070f32b2d0e02f8a1fd72fe8278cdf6cc80
font_01_sfnt_off000105a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A7 10608 bytes
SHA-256: 2782441124d66a962c4251deb3a5cd7c8454a2e04d81d5b73b90003147069859
font_02_sfnt_off000129c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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