Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3041bd80271e2c…

MALICIOUS

PDF

91.2 KB Created: 2021-03-14 08:26:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d8f78c6bd4533574200ebaa7c5b50f35 SHA-1: d62623764014e9266e08915326168d376d71ef9b SHA-256: 6c3041bd80271e2c62fac47e09ef82005fdfdd7272f0e0393d6b1ba75fb3a709
136 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified an external URI and an image lure pointing to an SEO redirector, specifically `https://soxebez.ru/award?keyword=air+suspension+system+pdf`, which is indicative of a phishing attempt disguised as a free download. No scripts were extracted, but the PDF structure and URL suggest a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=air+suspension+system+pdf PDF link annotation
    • https://cdn.sqhk.co/lufelumad/Vsgeiea/guess_the_netflix_series_2020_espanolas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470207/normal_5fdf1381b83e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476564/normal_6026647f2018c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493881/normal_602a584bc24e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462696/normal_5fefcf8483b30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403676/normal_5fdddd9f5f7fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427781/normal_60216f71e84a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450864/normal_5fcf17b382156.pdfIn PDF document text
    • http://xonigej.mypressonline.com/levexidor.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/bibidG8/julipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_604a782407e43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369190/normal_5ff51f8c1ecfc.pdfIn PDF document text
    • http://dasiwujupuna.sportsontheweb.net/82571332318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414695/normal_5ffba680a56cf.pdfIn PDF document text
    • http://wulutano.mywebcommunity.org/komebogoxapezuk.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiwuximu/0he7Gjf/39508241170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_60307a713e81e.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/igjbjaz/project_management_glossary_pmi.pdfIn PDF document text
    • http://www.motorera.com/In PDF document text
    • http://www.tubularsuspensionsystems.com/In PDF document text
    • http://www.therangerIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_0df24eeeb99541c0b31442d03386752e.pdf?index=trueIn PDF document text
    • http://kikanelomer.onlinewebshop.net/80463622641.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_d1f503f4af74402aa8a2435068079a7f.pdf?index=trueIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_9b3df293614c41fb8c7bd0472a6fad68.pdf?index=trueIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_3a8a80c6c5e54a49a7d8701fd805ead2.pdf?index=trueIn PDF document text
    • http://dirazonun.myartsonline.com/senior_systems_engineer_jobs_uk.pdfIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_f6811e8c2b94427e83f4c2aa6f752b87.pdf?index=trueIn 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_off00012737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12737 5036 bytes
SHA-256: 8607ac5a930fca354bb1bac72b318aa9184048bbe9f9136a53f745990503955c
font_01_sfnt_off00013850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13850 11188 bytes
SHA-256: 6540a5f51fadace10e7c8dec2cb2ce59cfc08485414838c3b38e71e0523649ec