Malicious PDF — malware analysis report

Static analysis result for SHA-256 256ec45932d7bd9e…

MALICIOUS

PDF

87.7 KB Created: 2021-03-19 17:38:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ea6770f9b958739c8c87934f48112a5f SHA-1: 5042a3763934f03e5b20f0e01316c57fc1f507fc SHA-256: 256ec45932d7bd9e7526055aba58fbb9abd8fc7887063d3c1b767e31481f5d21
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 0.9989

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/wix?keyword=3+week+diet+and+workout+plan+pdf PDF link annotation
    • http://tiboxul.iblogger.org/business_writing_email.pdfIn PDF document text
    • https://cdn.sqhk.co/naruxibe/hgsTZgh/color_changing_light_bulb_app.pdfIn PDF document text
    • http://dubiniba.iblogger.org/70442068175.pdfIn PDF document text
    • http://myluckybet.xyz/sikotexofjdfk.pdfIn PDF document text
    • http://ionatr.space/8283215435099yf.pdfIn PDF document text
    • http://lifeshop.pro/sujuranaruvapifuwisanapuculqq.pdfIn PDF document text
    • http://tiwigibafofovit.iblogger.org/58552074588.pdfIn PDF document text
    • http://kirerazunesamip.22web.org/8222049600.pdfIn PDF document text
    • http://spainsale.pro/cadbury_schweppes_case_study_answersyy26a.pdfIn PDF document text
    • http://wovewor.iblogger.org/54516305263.pdfIn PDF document text
    • https://cdn.sqhk.co/nosilaxuziz/jh0jeha/gravity_trampoline_park_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofebiziv/gegL6ha/33545885209.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/ijSigid/77990010316.pdfIn PDF document text
    • http://goloszauniver.fun/49349667857xd73u.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/cgil5jz/67723644544.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://xoritafojibi.epizy.com/11579103988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e087a2-a7b4-44e5-abfd-e42f3c9efd4a/radawutorof.pdfIn PDF document text
    • http://fojoxolizono.rf.gd/asmanex_generic_form.pdfIn PDF document text
    • http://gazugitub.epizy.com/brawl_stars_kostenlos_online_spielen_ohne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab51ddb-9fe8-4af4-aea9-7bf3c4d63a67/nevibeda.pdfIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_1395460832794f5789e710326f8c54bd.pdf?index=trueIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_1ca0dfb2ccf8450d8f0358113c413d81.pdf?index=trueIn PDF document text
    • http://nuvitaros.epizy.com/40957706567.pdfIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_e15b84ae67cc496e86ff109984894b5f.pdf?index=trueIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_858cb70492cc4de0b9f020fdeadf3187.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D7 4964 bytes
SHA-256: 829e4788456dcafbb71ce0abd4df2ecf7701a970ecf1ae81f12b432c021eef03
font_01_sfnt_off000119d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D1 11696 bytes
SHA-256: f48588b50e0b27963170109973dd9e5dd2ec2da598a2fb126329946005d308c2
font_02_sfnt_off0001410d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1410D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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