Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7054c16cda7116…

MALICIOUS

PDF

76.1 KB Created: 2021-03-19 20:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 692fbe8f86d609fa3ecadb78e9714a79 SHA-1: 7ef037d3f3e333e48966bc80c95428e2c6e3c6b4 SHA-256: be7054c16cda7116a42f7766f705271d3b816d2ea7784c92ff2e05c8dc950953
186 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 0.9999

Heuristics 6

  • 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.
  • 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://seumenha.ru/aws?utm_term=can+you+wear+a+long+dress+to+a+semi+formal+wedding PDF link annotation
    • https://ruruzepekasoto.weebly.com/uploads/1/3/4/7/134753799/50e909ffb3c63.pdfIn PDF document text
    • https://cdn.sqhk.co/lutumodigi/ggoB6ia/pepowabaxazawururudukor.pdfIn PDF document text
    • https://wipezupogev.weebly.com/uploads/1/3/4/3/134307181/penuxifalovawabipu.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/gfihh1D/amazon_prime_video_tv_series.pdfIn PDF document text
    • http://ersoil.fun/vikavebipidasv16lr.pdfIn PDF document text
    • https://dojixevagix.weebly.com/uploads/1/3/2/6/132682303/3751617.pdfIn PDF document text
    • https://xoxoxiwozolem.weebly.com/uploads/1/3/0/7/130739626/funasime.pdfIn PDF document text
    • https://dazutexigamufo.weebly.com/uploads/1/3/2/7/132740900/d61889.pdfIn PDF document text
    • https://jiwuzutobaduf.weebly.com/uploads/1/3/4/8/134889186/1322851.pdfIn PDF document text
    • https://bafonalilazuxi.weebly.com/uploads/1/3/4/7/134731076/fawulamaleg.pdfIn PDF document text
    • https://lubikumak.weebly.com/uploads/1/3/1/4/131453733/joxuwijok-vutidil-sufeb.pdfIn PDF document text
    • https://finiruxadaral.weebly.com/uploads/1/3/2/6/132680938/fuzijinixomix.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/CMhhTnr/35496815578.pdfIn PDF document text
    • http://mosdendy.store/divawurizumeruwuzifafozanw1gi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f402ea-6692-4142-bd7d-07fb61a74b46/41377554095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/119fda44-afbb-4201-b1f2-224728e33d05/japiwidawodezeliz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89a44d5-8c8b-4cc3-b023-ba223ed76f0b/bosch_silence_plus_46_dba_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c88a724f-c226-42f3-86d9-5949324d949f/why_wont_my_security_light_work.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_off0000eaf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF8 5324 bytes
SHA-256: c3aab256079ae4b78d280b165febf55e8259413a88c70836ed0218ba7ace65d4
font_01_sfnt_off0000fd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD10 10832 bytes
SHA-256: c25acf65edaa5cb4745de1d6f7032fa3eadbb0aa219de327e0d1304277d5c29b

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