Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca10ea75fbfe242…

MALICIOUS

PDF

159.0 KB Created: 2021-04-13 13:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fe8c4047e38c2b060382f83620c62586 SHA-1: bcdde5a360b153462929fecd2ac04e4442256731 SHA-256: 7ca10ea75fbfe2420e34e39ab409190cd575bfb2dcc279b0845b5e777c590f77
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9760

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pelibifir.ru/strik?utm_term=physics+serway+jewett+9th+edition+answers PDF link annotation
    • http://fonudesuwobulud.mygamesonline.org/barefoot_investor_online_free.pdfIn PDF document text
    • http://vagejilubozi.iblogger.org/twilight_2013_tamil_dubbed_movies_download_tamilrockers_2011.pdfIn PDF document text
    • https://tazugusalasuxof.weebly.com/uploads/1/3/4/5/134581133/5556188.pdfIn PDF document text
    • http://juxumigine.mypressonline.com/entrepreneurship_case_study_examples.pdfIn PDF document text
    • http://fruitslope.online/corrugated_steel_sheets_cape_towndhh1a.pdfIn PDF document text
    • https://lerelapukuvi.weebly.com/uploads/1/3/0/7/130740054/7994320.pdfIn PDF document text
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/wilotaze.pdfIn PDF document text
    • https://kipokemob.weebly.com/uploads/1/3/0/7/130738996/penugu_buroki_mozotivasel.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/singer_simple_3223_retro_sewing_machine_reviews.pdfIn PDF document text
    • http://vijepuwobewi.mygamesonline.org/minifemoxa.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/tevubem.pdfIn PDF document text
    • http://chambrehub.xyz/16929953361hush.pdfIn PDF document text
    • http://triple-doska6.club/currys_essentials_dishwasher_manual_cdw60w18o10qh.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://s3.amazonaws.com/fedojigudaj/room_bookshelf_couch.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/2992209526.pdfIn PDF document text
    • http://memorakubot.epizy.com/aspects_score.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/sanyo_65_4k_tv_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/tuvasitaguxidixagi.pdfIn PDF document text
    • http://zevijefe.rf.gd/kowirorog.pdfIn PDF document text
    • http://zujakogi.onlinewebshop.net/5310794586.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/bavagi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off00023a59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x23A59 21432 bytes
SHA-256: 8c782990d53bde0bfe97b8fe4fe422c093145c10ed1f62644f62df4978ef353c
font_00_sfnt_off0001eac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EAC4 5488 bytes
SHA-256: b0db3ae5815156d9caf81bf29eb7dc54a740a16566620429d64a914911111a18
font_01_sfnt_off0001fd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD76 5212 bytes
SHA-256: 717cda21d1faf9c4de22984e90d34947d0d9b3fd3c452dcd27525b18a447ff11
font_02_sfnt_off00020f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F2B 12876 bytes
SHA-256: 6952fc5d711272ee3848d6b249dabe74982f6b584474d8ffe9d0d0ee25b7397c
font_04_sfnt_off00025e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25E23 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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