Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f62fcea76c789f…

MALICIOUS

PDF

67.1 KB Created: 2020-12-17 12:56:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e6e1a6bff2a2702d6728e0395cd23e8c SHA-1: 91440b431fd00dd82dbb25c7118e6edb08b0412d SHA-256: 11f62fcea76c789fec3a4c73fe23cdc68ac627f765d6410dd9a63cfea48b4a36
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One prominent external URI points to 'https://traffnew.ru/123?utm_term=religious+symbols+in+life+of+pi', suggesting a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://traffnew.ru/123?utm_term=religious+symbols+in+life+of+pi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f871070e0f91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370278/normal_5fcac95936801.pdfIn PDF document text
    • https://sijodeteketede.weebly.com/uploads/1/3/4/4/134486162/begewivokugix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_5fa6147723db9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384149/normal_5f8e676710543.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/aa804a3c-011c-42d9-ba05-629c6e782762/fojokiwokalaliji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f45dcf-50f9-4b1a-a826-974a3ad724b5/design_statement_def.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8732e691-b6a7-465f-869a-77ebbb2a9577/goldfish_turning_black_on_top.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f989982c-cfbe-4222-a015-205806951dc8/rokaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6277e981-e7d4-4dd6-8de4-12d8d0c275ac/bagexekidutufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7cf03d7-957b-4724-bfa3-30f7359ede24/lalad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65124df132613bbe271c4/t/5fd6520d89566e781f4cc7ff/1607881229320/convert._lrtemplate_to._xmp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/732c1004-0db1-4093-a0fb-dac4de9eff4a/stuffed_animal_repair_los_angeles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44de7c90-69ae-4569-b0f7-5e729cbba1be/61749026610.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_off0000ca32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA32 5164 bytes
SHA-256: 8f826b83deafc5054229a232a16272de8da3268fc0b04e72f6e33a043a210bb6
font_01_sfnt_off0000dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 10420 bytes
SHA-256: 2488db21fde7404135b4d281800e8eacc03c0135d27573db3ed241977b2314b3

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