Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9ce7d538f76769…

MALICIOUS

PDF

77.5 KB Created: 2021-03-15 02:48:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0f326b6c844f5e55c2cece86d553c361 SHA-1: ef268e8ffe2de4c5b5b33e68f2cce9bb7c8ebf48 SHA-256: eb9ce7d538f76769bb19296946afe1a3778f220593544329b82ad5d2cd0e5865
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, with a high ML score and ClamAV detection for phishing and trojan activity. The embedded URL points to a domain that appears to be a redirector for a phishing campaign. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to direct the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/strik?utm_term=minn+kota+power+drive+v2+remote+problems PDF link annotation
    • https://cdn.sqhk.co/sadirorig/nhfhiEh/jawudaxaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/bitubebo/gjjiRhj/oceanhorn_apk_paid.pdfIn PDF document text
    • https://cdn.sqhk.co/gopefovepagi/Pb5vjfQ/john_carpenter_vampires_1998_trailer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388052/normal_5ff13d7121235.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/MhbN1ha/balance_sheet_format_in_gujarati_language.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443803/normal_5fef906288b24.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/kjahfm4/kazeradejumoni.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/iajhhaf/ratorivigufawubedupaga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5feba25b09262.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382790/normal_5fe38ef24f766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_6013a2e6a6455.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/najipavez/kurirafogovasimike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/086a00dd-9477-4ad7-98e3-ed7d48bfc7f0/59881766007.pdfIn PDF document text
    • http://rinexaxar.rf.gd/84538090281.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/raxav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68abd6ed-dfe8-4b4b-83d2-c6ad5982eae3/gegakuwofofebuzelala.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/lusofajuxisetilewedadig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dc1b3c4-8ae6-471d-bff5-b43eb558b320/the_war_begins_apush.pdfIn PDF document text
    • http://jonogib.epizy.com/what_is_the_theme_of_the_adventures_of_huckleberry_finn.pdfIn PDF document text
    • http://nodefojabotozij.rf.gd/beethoven_biography_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/apache_poi_for_selenium_webdriver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ee481b-f635-438a-a250-180f66ebaf85/how_to_start_your_own_market_stall.pdfIn PDF document text
    • http://bazokupakem.epizy.com/present_perfect_continuous_tense_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAF 5600 bytes
SHA-256: 00d27107fdc930d99e89e9a55cac524054ffb39d6832a3c1345f6fbd7c03b1df
font_01_sfnt_off000101c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C0 10764 bytes
SHA-256: c806a39736d9f4604b483a386784099ea2d2cfbd671b9efd7c185f951ddf84f7

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