Malicious PDF — malware analysis report

Static analysis result for SHA-256 75eef2025cb6160e…

MALICIOUS

PDF

79.8 KB Created: 2021-03-22 06:56:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1a90d6add031010158a5a755ae7823c9 SHA-1: 14fed5d14e250be98f3c21b3af8d1deb5f02bf25 SHA-256: 75eef2025cb6160e534c047c9bcc0f5fafe02f83380c9e0cdb1fb06aeb5ca5fb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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://mezovuduw.ru/strik?utm_term=fisher+price+toys+for+toddlers+at+target PDF link annotation
    • http://copyright-security-ig.com/76078215891hmp4x.pdfIn PDF document text
    • http://daxamel.mywebcommunity.org/english_short_story_book_download.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/audit_procedures_for_accounts_receivable.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459467/normal_602d4506f3bc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491155/normal_5ff7741f4e69d.pdfIn PDF document text
    • http://fuzirirofo.iblogger.org/honeywell_thermostat_t4_user_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_603f6bfae0874.pdfIn PDF document text
    • http://jnatural.space/22690815583hz0mr.pdfIn PDF document text
    • http://agent-ritual495.online/duzamovemevarapopuzukekcz66.pdfIn PDF document text
    • http://vashastrahovka24.ru/1642638774393ltn.pdfIn PDF document text
    • http://tomogorman.com/drawing_and_painting_classes_for_adults_near_me0ltcp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460228/normal_5ff2dbb7e55f1.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/rusosuxoxuguvukodoxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dapizodipe.myartsonline.com/20473479376.pdfIn PDF document text
    • http://wokakasav.onlinewebshop.net/tch_nh_t_file_online.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/kanoriwomejadurabelurewe.pdfIn PDF document text
    • http://nupopejif.epizy.com/formule_de_la_clairance_de_la_creatinine.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/kodatopimuxuvek.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/pcra_quiz_sample_questions.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/timazekeganozowirora.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/21305849162.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/surah_yaseen_ki_fazilat_in_urdu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E1 5156 bytes
SHA-256: 4c9f87701be9f2f31b974a1d9b67364eb31d6f0143deab24dff6a6a522896e88
font_01_sfnt_off0000fb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB88 12072 bytes
SHA-256: 87f2868337776fe924098099d6620a0734712e9813cf8fbd43ad8cf4131bc194
font_02_sfnt_off0001237b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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