Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52b08a9f2bb4681…

MALICIOUS

PDF

83.1 KB Created: 2021-03-30 23:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3a461173e8e1f5e1409ee79644381239 SHA-1: 15c3e5b8868eb172ceb0eeb41c6f3d11e108c89f SHA-256: a52b08a9f2bb46812b805adcef2649e754c9063be44ad55d1a99460c8cea85f4
176 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. 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 0.9954

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dafemum.ru/wix?keyword=war+storm+clash+of+heroes+apk+download PDF link annotation
    • http://pidikugojan.22web.org/one_summers_day_sheet_music_violin.pdfIn PDF document text
    • http://dojemop.mywebcommunity.org/58974284603.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/71299187540.pdfIn PDF document text
    • http://gobitujesan.scienceontheweb.net/cervical_cancer_book.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/hfidhjg/temilawigujefezigifewix.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/c8yhj9P/puxin.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/area_problem_solving_worksheets.pdfIn PDF document text
    • https://fosevagepuvuro.weebly.com/uploads/1/3/1/8/131858592/4224956.pdfIn PDF document text
    • https://cdn.sqhk.co/vixawutozama/bjhNIkY/white_fluffy_bird_feathers.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/jojdhbl/the_joker_hd_wallpaper_download.pdfIn PDF document text
    • http://nawenelogasivur.22web.org/que_es_el_bitcoin.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosudav/i7TDMJ8/68738683721.pdfIn PDF document text
    • https://muwevowaxa.weebly.com/uploads/1/3/5/9/135992822/jomomu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/banner_labels_16_per_sheet_template.pdfIn PDF document text
    • http://kewetanetoza.atwebpages.com/87918696207.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/82823003689.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/99088666294.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/jepimiwoxuxibobakudanika.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/97682033871.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/85769756364.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/litowinojubofegagivogafi.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/nupaxutunonov.pdfIn PDF document text
    • http://sonasekofuxix.rf.gd/android_recyclerview_horizontal_scroll_example.pdfIn PDF document text
    • http://tizoxojuragato.epizy.com/36993390980.pdfIn PDF document text
    • http://kuwoguki.epizy.com/agyo_privacy.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/45420285713.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_off0000ede1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 6052 bytes
SHA-256: 81f08efd6850efb8555785a32f0e5226536845fc6a70eb2a9f79f7fcf03748d1
font_01_sfnt_off000102a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A6 5564 bytes
SHA-256: 544b7ad37a21fb3e59d45f62f8636d7bacc07d4de8963628dfa41ac7bfc811a2
font_02_sfnt_off00011580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11580 11688 bytes
SHA-256: 7d6e88706d80b0076ff79f17be35ec003211bbd889776c6f1be34ada628fc6dd

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