Malicious PDF — malware analysis report

Static analysis result for SHA-256 299e71c42fdd3dcb…

MALICIOUS

PDF

70.5 KB Created: 2021-09-06 08:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a046f0a91e2d4a09d3b18aa367e1f0a SHA-1: 266d3563e62421c9507e6c4c8ac223ef270319fa SHA-256: 299e71c42fdd3dcb9697be073735e7e50978c55bac234e37c5420502155c31a0
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/d3db3bcaf0da8f07f110fcf2d9073a5c/koriwopidolefexig.pdf
    • https://mysilo.com/upload/ckfinder/files/91783045583.pdf
    • http://inwama4.vn/webroot/img/files/97485795259.pdf
    • http://polskienarty.pl/data/aktualnosci_imgs/file/wevukarovoxo.pdf
    • http://195exim.com/datas/files/kukaseroxelolefovukeb.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/dba8d96aa25fc9ad24dd80fe7f5c053d/gexilovivapuwafigifu.pdf
    • http://krakow4you.pl/krakow/files/mifirotinuz.pdf
    • https://pointvirgule.ca/upload/editor/file/kunedaropifibapus.pdf
    • http://biblioteka-belzec.pl/upload/files/pufojoterujunu.pdf
    • http://uceng.net/_UploadFile/Images/file/93030987003.pdf
    • https://tvsporedi.si/vsebina/42764871821.pdf
    • http://mea-travel.pl/userfiles/file/pikotanega.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/5ea23470cfcf13116cedc72537d0601f/19307114191.pdf
    • http://wghsclassof69reunion.com/clients/b/b3/b33699c65747f61a54cd06c2fab73d22/File/devobidivon.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/6d7b53628afcd853d8eacf2ca56fc9d9/kufinibizepafokepefo.pdf
    • http://stinpo.com/ckfinder/userfiles/files/piliwopuzejiva.pdf
    • http://ipublicity.cz/data/file/79198130329.pdf
    • http://hanhthien.net/uploads/file/vixovojipazezajegigumo.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/18ce682d102ec126206ff7474b645f65/41566823046.pdf
    • http://grafosaleservice.cz/images/fck_editor/file/37944608981.pdf
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/60568490452.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160905c5706476---jitutilodafadatef.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/de177bab9995606cd3e9446fece7d0bc/dimedexizimupisisitobusut.pdf
    • http://saydersan.com/firma/files/78320945609.pdf
    • https://ddc-touggourt.dz/ar/files/43125880373.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=business+plan+pdf+fast+food
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b76e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB76E 16792 bytes
font_01_sfnt_off0000cf80.bin
b5314d0859b94f42c06fd94f7d5cfc0e21f774e487ded5d841d934e40d15abf8
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF80 14636 bytes
font_02_sfnt_off0000f3e9.bin
6f5955dbbddaceb2daf15fa2c7566bc23830b7c6986d873397e5ba4fcc7ed0e0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E9 10544 bytes