Malicious PDF — malware analysis report

Static analysis result for SHA-256 e295aed40d0a34f7…

MALICIOUS

PDF

78.0 KB Created: 2021-04-02 05:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 385c741b267bc5787e06a1c377efed93 SHA-1: 043848604a9ad2ad4af2252284b40ebc56d429c8 SHA-256: e295aed40d0a34f7281936ba11ba37316968c4bd87c2c683db6cb14f3f7d93ad
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=free+teacup+dogs PDF link annotation
    • http://paruxezogu.mygamesonline.org/carrier_aire_acondicionado.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/example_of_broad_statementntqam.pdfIn PDF document text
    • http://naturalm.space/dugekuvisorifi6z29.pdfIn PDF document text
    • http://wimosam.22web.org/ruin_and_rising_book.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://ruvikuvi.mywebcommunity.org/28717819469.pdfIn PDF document text
    • http://inostrana.com/79740444361j3jr.pdfIn PDF document text
    • http://rat-red.space/63607649652kfbxe.pdfIn PDF document text
    • http://italia-doc.space/973581420173w00s.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/the_hound_of_the_baskervilles_chapter_1-8_summary.pdfIn PDF document text
    • http://xepezugabiposa.22web.org/the_keys_to_the_effortless_golf_swing.pdfIn PDF document text
    • http://uscreditreport.info/how_to_get_a_startup_business_loan_with_no_creditm357g.pdfIn PDF document text
    • http://aycotoro5.xyz/why_do_they_use_knots_instead_of_mphmnxey.pdfIn PDF document text
    • http://slmit.fun/fimamoxaxuripz2m9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/387a21f8-a64d-4587-9ba4-592d31b3f6a2/4_pics_one_word_cheats_level_2240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ddb825c-d0ea-4061-80af-80b4942e8865/xidazax.pdfIn PDF document text
    • http://palulofegag.rf.gd/15510122691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de83862-6f3b-4903-bb1e-9c8e4071cbce/pugafagenokaxiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3a9463-0f91-42fb-9c6e-cf0184ecd974/20805028291.pdfIn PDF document text
    • http://zagusax.rf.gd/2017_ford_mustang_convertible_price_canada.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_off0000f434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF434 5164 bytes
SHA-256: 571388e9e3a49c845929029aa1e4ce1f38cf5888ccee56ffc74371739af59ab8
font_01_sfnt_off000105d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D4 10504 bytes
SHA-256: 8809a141a63124c94ade96bf95b11e040e582a2179fff530e222acf65a8eea4b

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