Malicious PDF — malware analysis report

Static analysis result for SHA-256 29bc1e41996bd2b4…

MALICIOUS

PDF

113.3 KB Created: 2021-02-14 20:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e06fbc2fd5eac85d08b424aed3a40d94 SHA-1: 903a6660e65a059f3971e4f9d32aa01759cdaf92 SHA-256: 29bc1e41996bd2b4131913c4cf1596289a32df422c0f2f6d0d2508ea34c9e719
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, strongly suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection further confirm its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://jacksth.ru/123?utm_term=lexus+is+250+manual+or+automatic PDF link annotation
    • http://naturalik.fun/8493045705w98j0.pdfIn PDF document text
    • http://trokot-newshop.online/niveguguwarumujexulabaqav08.pdfIn PDF document text
    • http://sallles.ru/308655883172lpce.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimurami/f2zpyRD/clock_face_template_word.pdfIn PDF document text
    • http://topstudy.fun/detailed_lesson_plan_in_english_grammar4inrp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445868/normal_5fea0ab9ecf85.pdfIn PDF document text
    • http://idealica-tufficiale.website/free_spine_templates_for_bindersp3sf0.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/fTijSUW/79805468601.pdfIn PDF document text
    • https://cdn.sqhk.co/toruwapelot/eKghljd/59278684290.pdfIn PDF document text
    • http://lovelyhouse.online/ponifojadibobunove1bpsp.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/gJ14Jhh/amazon_sling_tv_customer_service_phone_number.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/68321881666qhlm8.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/jarjeji/11114864392.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/Kbshhgn/brhe_berry_baby.pdfIn PDF document text
    • http://gratoraama.website/59315919712sl8a2.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/PE1ha7b/20544783480.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/pjKigjf/tupekegade.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/Rlgjhvk/95823275873.pdfIn PDF document text
    • https://cdn.sqhk.co/jememobak/6ieMdjb/foodpanda_rider_app_pakistan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CFE 2960 bytes
SHA-256: ba9dd86ad06677ef82b9fc66565cbe1db364e5caa8fb73f24ce3e10b7ab9a08b
font_01_sfnt_off00016781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16781 5352 bytes
SHA-256: 8e0735b6a44929fdc18611418f4c245e432bcb9fa6f0cda34faa437fc17f0ae2
font_02_sfnt_off000179ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179AC 11808 bytes
SHA-256: 533bb62c5275388128f7e6f3f8c5ff6bc3a1a6c4a372196ac6d3d3701024afe5
font_03_sfnt_off0001a1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1CB 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833

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