Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecbaec0aad70284…

MALICIOUS

PDF

86.9 KB Created: 2021-03-06 08:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5f81f9f3eb754d70152f10ae3c7a153c SHA-1: 3890dbc74ff8899875aa40fe6684a7412663457b SHA-256: 6ecbaec0aad70284de7e8f14d6e44fb0c481af9d3d661c121d59ee8df0c1bd6a
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 0.9996

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 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://jumiwimov.ru/wix?keyword=ib+english+hl+paper+1 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459325/normal_5feee9dc181c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_6026b11bb307f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393188/normal_5fd02e0890941.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/anatomy_for_sculptors_understanding_the_human_figure0jep9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386591/normal_5ff6690444f44.pdfIn PDF document text
    • http://eurofamily.pro/rorupijaxidinegimd4yv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5fdb7a48d5f1a.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://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_a0d9e70f64aa429c883cde562a5265f4.pdf?index=trueIn PDF document text
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_7b38b2fb0b504988a6f354d4f88b749c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/63341881898.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/suzabiwexefurazaxenutuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/60219405975.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/used_android_phones_unlocked.pdfIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_f913a6fa198444d5a27afcaa8ece81ea.pdf?index=trueIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_a27b61ffe28b4804812023f55968575c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vipinib/70988829344.pdfIn PDF document text
    • http://sowutafamewuben.rf.gd/dekip.pdfIn PDF document text
    • http://tozudojixoku.epizy.com/4342426730.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/juzokaruxekavikokibozelup.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/tajodusuxokudajuz.pdfIn PDF document text
    • http://zofekaxezujujom.rf.gd/xexexixama.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_off00010cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF1 4808 bytes
SHA-256: a2bb3d26d773b0b8a1bdc88b0057a62566e88630a4427d3a89fcd8c82f97f845
font_01_sfnt_off00011d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D25 10236 bytes
SHA-256: 0bc07425a836a311de5ec41bc8ea09fa6bbb48c8b86adea5471341077df62063
font_02_sfnt_off0001402f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1402F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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