Malicious PDF — malware analysis report

Static analysis result for SHA-256 1547c236b0474d4b…

MALICIOUS

PDF

74.0 KB Created: 2021-03-15 01:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 107a8bb98e6b96feac1b0dc337016a49 SHA-1: 8efa61ba674746fedc32cd5744686a6a5fe744cb SHA-256: 1547c236b0474d4bf10e91edc6af10a894b867da24b29f26b29e0ac408a434a2
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and multiple heuristics indicate it's a link farm designed for malicious purposes. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/wix?keyword=unilever+free+samples+usa PDF link annotation
    • http://krokoboko3.xyz/xexazukmka9w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487905/normal_600cfb59d7017.pdfIn PDF document text
    • http://dfwshootersupply.com/xufatumas6231q.pdfIn PDF document text
    • http://leree6.club/english_phonetics_and_phonology_philip_carr6phsa.pdfIn PDF document text
    • http://idealica-ituficiale.website/flumazenil_davis_drug_guide2e7j0.pdfIn PDF document text
    • http://trysoda.club/como_fazer_um_manual_de_instrues_no_word50lf5.pdfIn PDF document text
    • http://fastcreditreport.info/sisaxevuvaleyc5s8.pdfIn PDF document text
    • http://opt05.ru/65293491878xst6h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391008/normal_600452b342832.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416932/normal_5fca7c40d701d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_6011974568f75.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/41402531185lvsj6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367964/normal_5fc93cff73e13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5fefa76d42d8a.pdfIn PDF document text
    • http://www19216801.site/5805503042v9x7u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530457/normal_5ff82abca5ce9.pdfIn PDF document text
    • http://tevfikyuce.xyz/republic_of_doyle_season_1_episode_7_casto85mu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_601aee48c22bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420244/normal_5ff86566417b0.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/9228d182-c501-4d4c-878e-6b4d19e9a878/66113075323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd01656-bfb2-46e8-848a-5fd14ff5f50b/harry_potter_und_der_stein_der_weisen_buch_erscheinungsort.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8122f55-9821-46b7-b1d6-a5f1529edbb0/sunbeam_mixmaster_compact_pro_spare_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecc97355-232f-41bc-8123-b406f7dd88e8/motorola_radius_cp200_replacement_antenna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cfd450e-1abd-4efe-b91e-66b472c53349/can_sinkholes_happen_in_the_ocean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6206e9e8-4296-4a5d-8045-be820fb83317/34658559636.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_off0000e157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 5100 bytes
SHA-256: 539e436b99b95ed67b6b9a468dc5182b1945bb0541c8d02a98f46fc649f1489a
font_01_sfnt_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 11908 bytes
SHA-256: 1756ab95dc89472aa2f3d3f6e50435393482e93cbcd7feb469d3a73225fd985d