Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fdfedd069efac1d…

MALICIOUS

PDF

72.2 KB Created: 2021-03-23 08:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fc67d1094ea4d9c4f2402d4c7e2c136c SHA-1: 19004a51b3f75cb73e1fa5d906ed9d5e89863d2b SHA-256: 7fdfedd069efac1d91bb27ea6dcf2972b96ee04688db8344027de4037b28fd35
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 0.9998

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://vilenefex.ru/123?utm_term=speechless+piano+sheet+aladdin+free PDF link annotation
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/zimesajozifemi.pdfIn PDF document text
    • https://jaxifojuw.weebly.com/uploads/1/3/5/3/135351184/jisavuluwab_rivanew_tugibi_lapolabope.pdfIn PDF document text
    • http://saripituxupagek.sportsontheweb.net/dokowiwejinu.pdfIn PDF document text
    • https://polavimiwusirew.weebly.com/uploads/1/3/2/6/132681763/8722073.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/what_are_the_writing_methods.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
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_46408b864754477ea5bf20709a149cfc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/addda26c-0a0d-48e3-8a5d-0f312dc8241d/ariens_rt7020_tiller_parts.pdfIn PDF document text
    • http://disobaratid.rf.gd/alcatel_router_commands.pdfIn PDF document text
    • http://wareguw.atwebpages.com/29038501372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a111075-cc81-4815-bd30-a9365d4a8dbf/how_much_weight_can_a_2008_dodge_ram_1500_tow.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/15892599813.pdfIn PDF document text
    • http://rodisasedozax.myartsonline.com/what_to_do_at_gold_saucer_ff7.pdfIn PDF document text
    • http://fepoxojosatomu.epizy.com/9889155909.pdfIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_f59a551f6a7f40528a692400c9181d24.pdf?index=trueIn PDF document text
    • http://wijopimitiraze.epizy.com/pudezulekifab.pdfIn PDF document text
    • http://xenezipulugiji.atwebpages.com/how_to_write_a_resume_for_data_analyst.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28735d53-623f-4e66-8d0e-8161da0d3e28/17327776569.pdfIn PDF document text
    • http://lapetagalelan.myartsonline.com/28470822196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a13527-80e0-40f4-a3c8-32b51607a654/whirlpool_quiet_partner_ii_stopping_mid_cycle.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_off0000d1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AD 5132 bytes
SHA-256: 83d174e05a807bdf537d7b16a990d254a94369504a571c26710016a105c427ca
font_01_sfnt_off0000e308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE308 10228 bytes
SHA-256: 3b781493d483debe8b0fb73f21f04b69baad156e020221a910cd9b2a28955de3
font_02_sfnt_off0001057f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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