Malicious PDF — malware analysis report

Static analysis result for SHA-256 058bb0cc3c2ec827…

MALICIOUS

PDF

79.2 KB Created: 2021-02-27 22:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: aa8d81d48decb25c4f9d43e4b4e881ac SHA-1: dca3ec95c32ce5b04cdb6fce90e2fb079ae6cc19 SHA-256: 058bb0cc3c2ec8273ae1da8d244a837038ed4d7f041ee983ea28ca31e522963e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://xezojetit.ru/123?utm_term=mini+cooper+service+schedule+2012 PDF link annotation
    • http://nageramuvepom.mywebcommunity.org/what_trees_grow_well_in_central_florida.pdfIn PDF document text
    • http://mrshadow.net/sisogasuvetadejewidilab50mq.pdfIn PDF document text
    • http://pewodaz.22web.org/electric_forklift_checklist_template.pdfIn PDF document text
    • http://qrastenmap.online/how_to_use_daikin_mini_split_remoteccsmg.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/functional_analysis_psychology_example.pdfIn PDF document text
    • http://gta-msk.ru/flowers_of_algernon_film81qqu.pdfIn PDF document text
    • http://bellissimo.online/28292009369itgs4.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/doruzigamuro.pdfIn PDF document text
    • http://gulidomirebo.22web.org/alchemy_guide_archeage_unchained.pdfIn PDF document text
    • http://bt-management.website/zisitilarulekiwetinilikx2o9.pdfIn PDF document text
    • http://curvepreloved.com/html_css_table_td_width_auto7p4eg.pdfIn PDF document text
    • http://vedice.ru/10th_std_half_yearly_answer_key_2018mx00w.pdfIn PDF document text
    • http://henrysavbr.site/fitilogafezajemitegamuqde5l.pdfIn PDF document text
    • http://felidefewipikig.22web.org/tewabokozijudimojuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/xafogatok/hbhW2hd/49787558364.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugujub.onlinewebshop.net/nokubaxobigomubejawevikaf.pdfIn PDF document text
    • http://xigofopaxedu.rf.gd/anemia_falciforme_glutamato_valina.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_off0000f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 5340 bytes
SHA-256: 573233356d5d233d262b8d6aa19340083264bb368dad8bab36fa362932d8cc60
font_01_sfnt_off0001092d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092D 11148 bytes
SHA-256: aeba1aa436c332e12dea62657abbcabb3128800eb136e2499411cdb2690e5640