Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a2f06888e7266c4…

MALICIOUS

PDF

74.4 KB Created: 2020-12-19 23:08:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d4632468b572d0178a64f028711274ab SHA-1: efdd2380978c19e886a910fee1f30f2cfe1aba83 SHA-256: 8a2f06888e7266c48f7d08757b2a8d83c3cbdeaf273d592820f671c95e0a6b04
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous external links, with a notable concentration on disposable hosting services. The presence of a 'download button' heuristic further suggests a lure to download content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/aws?utm_term=pomelo+apk+full PDF link annotation
    • https://zuriloteva.weebly.com/uploads/1/3/4/6/134623588/pabefujut-soveko-zixak-zetujivudevax.pdfIn PDF document text
    • https://zojujevekuki.weebly.com/uploads/1/3/0/9/130969212/ad44f.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/tijixu.pdfIn PDF document text
    • https://vaferomesab.weebly.com/uploads/1/3/4/3/134351928/bbe3dbfd2518f.pdfIn PDF document text
    • https://jezafemobad.weebly.com/uploads/1/3/1/3/131383748/ae2059e165ca11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406501/normal_5f98295df2ead.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f87efe09b84a.pdfIn PDF document text
    • https://remezimivof.weebly.com/uploads/1/3/4/5/134582621/3180758.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/dujepav/bluetooth_logo_vector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3fed1d5-b870-4681-b037-4d48d0ce6411/xosedaketojesupaxikugadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9250ccd-4365-4ed5-b747-58cd18b39001/family_of_secrets.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/14761474888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f4c894-61e0-429a-90a0-86a2ac30fe9c/gebolum.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/ernst_der_erlkonig_sheet_music.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC0 4840 bytes
SHA-256: b2a20b1176fc9578f4ec97a2f297e3669f72ce7d957a863b9ca42bab15e4fe15
font_01_sfnt_off0000de2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2D 11568 bytes
SHA-256: 7cb2f84427094f5d98ad6bbf4c511a093f1d1f13d7bfab92e8d140d007d5714c
font_02_sfnt_off00010602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10602 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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