Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3f81a5f250e636…

MALICIOUS

PDF

89.7 KB Created: 2021-05-06 06:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6e3ba5686ff631c192139a1d246daafc SHA-1: bb672317719c48ec0fe2f9b7d3ea9384b479fa3a SHA-256: ae3f81a5f250e6366025bb2869d762fb88d6282e3808b0ea3327c9138c4480d9
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 0.9996

Heuristics 5

  • 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 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://nipisod.ru/strik?utm_term=how+to+understand+science+concepts PDF link annotation
    • https://cdn.sqhk.co/vojofarakiva/icjgfij/flying_arrow_game_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/ja2CihV/60125682741.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/what_countries_dont_need_to_quarantine.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/idCrKlV/i_gladiatori_albavilla_telefono.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/gcNghhe/62910136544.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/TwWjaCF/smackdown_wwe_wallpaper_new_orleans.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/71912882515.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/29414323314.pdfIn PDF document text
    • http://votixibutiro.medianewsonline.com/62949655687.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/51471474769.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/berabejosulelikuz.pdfIn PDF document text
    • http://dusanaputojinon.mygamesonline.org/ximowujidiwexamu.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://s3.amazonaws.com/gezejoputiwinu/sarapig.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/bawuremaxef.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/94351059529.pdfIn PDF document text
    • http://todifisafi.atwebpages.com/71850233377.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/android_or_iphone_privacy.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/wajubawufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0bdd067-f6ae-45a3-bad4-b888f6b4e031/xukobumemuzugizojom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3d49ce5-ddd5-44dc-a036-2715b11740e8/16587363502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa36789d-0332-456b-91ca-47dd41517a1e/76569855867.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

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_off00011439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11439 4972 bytes
SHA-256: fe2e3f1131dd0cc1aaa79433e9370c5d018902178183974612b46147420a5231
font_01_sfnt_off00012537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12537 11232 bytes
SHA-256: 6261149ad5373d0bde8b6e86f92a8462b7b1680e52ebc51543bc3d3c89964fb0
font_02_sfnt_off00014b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B6D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.