Malicious PDF — malware analysis report

Static analysis result for SHA-256 327e7dcfe54d4ef0…

MALICIOUS

PDF

77.3 KB Created: 2021-04-03 04:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 853f97d7d7bda68c6987d46318e5d0c1 SHA-1: 2acacab84f61d678d79f5c9698beaebdf6cac489 SHA-256: 327e7dcfe54d4ef07d75f6ab347f2d378c1b4ef879dc1fc79b654b72049e80e4
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 0.9991

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://soxebez.ru/123?utm_term=animaniacs+a+gigantic+adventure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5fe9e34011769.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_6004b4635ee99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385648/normal_6002695e30c2c.pdfIn PDF document text
    • https://zogabimokesowu.weebly.com/uploads/1/3/6/0/136082780/939257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420030/normal_602627379fa95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402520/normal_5fc9edefaf1f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477620/normal_6063ab06690a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_604f2474c473d.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/0db8d5b72fd3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443624/normal_60609554ca58c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379742/normal_60556ae525fff.pdfIn PDF document text
    • https://gabumisuxenumu.weebly.com/uploads/1/3/4/3/134366459/9c5f8e048fe45d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_6054799093b44.pdfIn PDF document text
    • https://vedirivokezijil.weebly.com/uploads/1/3/4/1/134108565/lexowitabuxexebageza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477629/normal_5feb69110496b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475720/normal_60173561cd18c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488346/normal_6041378ba20cb.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/dc672307-858f-4d59-9611-57c2c763fa06/dunkin_power_breakfast_sandwich_sodium.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c346e17-8200-4121-9993-0cd3658bf788/zemowated.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1e1600-f1e1-435e-99f7-ccdb4c232dcb/bakofetosazokurupiwojizog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e43d966-2d6b-4960-9edb-a933ab39cdc1/42013655322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43da8894-f728-48d3-bb8c-a2778606cd4d/canon_d2000_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf06ee2-dd56-44e1-95a3-7ba2d959a438/developmentally_appropriate_practice_focus_on_infants_and_toddlers_rent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc9ad39-4a85-4c76-9f9e-71fbd8d961cd/lactancia_materna_oms_hasta_cuando.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_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 5276 bytes
SHA-256: 3b43a0e48e0ebcf4c128563d01022ec90eb28320d18eeccaad4cc949ba63562a
font_01_sfnt_off0001039c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039C 10548 bytes
SHA-256: 0ea6c742d582fe7d9b4dc12d43b82c5d78d834a074c9a0623e10883b25c3070b

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