Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfc89c838ac1241…

MALICIOUS

PDF

74.7 KB Created: 2021-04-05 23:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 26b80d96aeaab00bc2213525bf835b8c SHA-1: b5770a5e5394839ef6d72878b7b1d87a6a26f960 SHA-256: 1cfc89c838ac1241ff80fdffd24181899c9322fdc08714e1b81914a44a33d42f
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 0.9997

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://xezojetit.ru/123?utm_term=helping+verbs+worksheet+grade+7 PDF link annotation
    • http://unonatur.space/2000_cadillac_seville_sts_owners_manualkqg5u.pdfIn PDF document text
    • http://naturebiolog.fun/koriwejapugeiuru7.pdfIn PDF document text
    • https://lafuxekezijunu.weebly.com/uploads/1/3/1/4/131406487/8172599.pdfIn PDF document text
    • http://nudistoff.club/how_to_turn_down_volume_on_adt_safewatch_pro_3000eaqxz.pdfIn PDF document text
    • http://milanbeach.fun/pagogijerupeera.pdfIn PDF document text
    • http://nunerixuvak.22web.org/trane_xv95_error_code_4.pdfIn PDF document text
    • https://suligabewe.weebly.com/uploads/1/3/4/0/134040343/wogumixe.pdfIn PDF document text
    • http://porn77.design/90608165571s4q73.pdfIn PDF document text
    • https://tumurotijom.weebly.com/uploads/1/3/4/5/134512141/zopixabuzow.pdfIn PDF document text
    • http://kungfumalibu.com/38313302146gm1zt.pdfIn PDF document text
    • http://cabinetsly.xyz/62563894475xj08b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_b5dd7555da7849f59c24723999e7aa41.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/51848e87-57d0-4672-848a-5a752b48de9d/47154979480.pdfIn PDF document text
    • http://rabuwojuxuxuna.rf.gd/72059339298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03764fb0-f45d-4e43-aa6b-7f1d6b6c4126/97743806084.pdfIn PDF document text
    • http://wupeguliv.epizy.com/zivoguwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42677933-71af-4fdc-b4f9-9fb7e8f01191/pisamu.pdfIn PDF document text
    • http://rugogeke.rf.gd/42299368288.pdfIn PDF document text
    • http://puxetedategekex.epizy.com/the_wheel_of_time_book_1_read_online_free.pdfIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_6b956d56e31049099c997da7db473d87.pdf?index=trueIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_a96f481eb02a422cb813efdb39ed8aff.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_off0000e666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE666 5616 bytes
SHA-256: e6c48df949db6636c712d5e4274531edfb3c49be0aa49750e787cee4810c4ad9
font_01_sfnt_off0000f989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF989 10632 bytes
SHA-256: 498c5e04db4d79a50ac0166949c19deec112b90c394f4a5ef6c07a69bef096dd

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