Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbdefd79e4f0a514…

MALICIOUS

PDF

68.1 KB Created: 2021-03-26 08:03:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2f478a46f3ce2ba336eede0fb709a4f2 SHA-1: 1879d50a76f48e8f5a08d5ea4bd1b6b8fe3baf30 SHA-256: bbdefd79e4f0a5147db37315789fd5e94aebd98bbb26255ca9fa4e6bef727d4e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9998

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 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.
  • 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://maypoin.ru/123?utm_term=rewrite+the+sentence+in+the+passive+form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488592/normal_5fe30c6ba60cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378406/normal_6023a650dde57.pdfIn PDF document text
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/vubedetudalisu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424036/normal_602864411e088.pdfIn PDF document text
    • https://foramifetutimif.weebly.com/uploads/1/3/5/3/135347605/2707768.pdfIn PDF document text
    • https://peramixirado.weebly.com/uploads/1/3/1/6/131637131/6182161.pdfIn PDF document text
    • https://lemusudavigi.weebly.com/uploads/1/3/5/3/135395292/7851859.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/lewutilujusejavo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_6010c946db26a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493905/normal_5fdad3a44d7f9.pdfIn PDF document text
    • https://mojikusabuja.weebly.com/uploads/1/3/5/3/135301399/db40a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_5fd2f8d68f97b.pdfIn PDF document text
    • https://fidimamafiw.weebly.com/uploads/1/3/4/6/134624465/pijamupikenup.pdfIn PDF document text
    • https://tabuwesajusa.weebly.com/uploads/1/3/1/8/131856124/funugil_bizasamopovofu_gimomejal_suruku.pdfIn PDF document text
    • https://topifovav.weebly.com/uploads/1/3/4/5/134595147/bopulifenaf_fatoti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480148/normal_5fde35931e4c6.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/lawakux/everybody_loves_somebody_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/beoutq_fail_to_new_software.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/lowaxejozoriratelorore.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/96091260784.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD61 5384 bytes
SHA-256: b76384e2f70ddadf6b266a46e557cb125dc91e08989c1dcccdb32f8833992da8
font_01_sfnt_off0000dfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA9 10388 bytes
SHA-256: bc02441b772f55e0895682dce1cd8686c4aaf9194435d5dc7f7c00c705c27910

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