Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9aa240dff933ff…

MALICIOUS

PDF

81.0 KB Created: 2021-09-03 09:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4b141603599f0f26be0aaf98f5c65aaa SHA-1: 26f3c288111e0d3c5099d7157278a4a9825cbe96 SHA-256: 2e9aa240dff933ffc0806351891c6d21fea81195ea480c1ca311cbd82e4a8f21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF structure and embedded links indicate an attempt to lure users to phishing or malware distribution pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://infrive.ru/uplcv?utm_term=mariposa+traicionera+letra+y+acordes+pdf PDF link annotation
    • https://parkettworld.com/upload/files/93093950811.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1a9accc59---relamuferon.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202108171742038901.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/tarivajugufepokoxexe.pdfIn PDF document text
    • http://antitumor.org/filespath/files/20210825140348.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e990547f3a---tegozasataza.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/f66308752b02e6882c3e7f83853dde59/24304637815.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/4c4b3dece58870f72df5ddee36fc1fc8/muzaboworukofejulemav.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/29493273275.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/nifupojisipajaxuruf.pdfIn PDF document text
    • https://people11people.gr/uploads/File/72749407260.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/50563582492.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/2325434279.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612c2a6b4e9d1---52726096203.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609d61da6364d---90277590803.pdfIn PDF document text
    • https://congnghethucpham24h.com/upload/files/jojadi.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/97811660343.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/werewezeteloro.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/41171125154.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b150b49ddbd---repug.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a34acc8548d---woguwobiwepesolifunede.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/621200033631e2b03da2b816028a03fc/32632635704.pdfIn PDF document text
    • http://unibeauty.com.br/ckfinder/userfiles/files/kudanapizodogomenopuk.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/sesegajebogikibazi.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/99e538d2d90868e27f9d5a81b0943c7f/75717324082.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084483be309f---gagowaviridi.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33D 10720 bytes
SHA-256: a2b31ef67949457c905b131f33e2e60dde45fdb5ef323a5298ca481eca82bffa
font_01_sfnt_off0000ec02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 19240 bytes
SHA-256: 8ca6c5e585656b9c414fe06a061212466be15171ba9d6a3cfebd3fd2dd017b61

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