Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee0303a6260ba7f…

MALICIOUS

PDF

86.6 KB Created: 2021-09-13 09:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a509ef50c579697a6cb4c01abbce4ec SHA-1: 954ef0e02f44a045f5f65cd0bea84c5f9a228b44 SHA-256: eee0303a6260ba7f24e099c9d37c5afc9dc97d925c8c1589a7e968b4a114f1a2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics strongly suggest an advance-fee scam, with the document body containing language related to lotteries, prizes, and delivery requirements. Numerous URLs were extracted, many pointing to disposable hosting or compromised CMS uploads, likely serving as part of a link farm to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://rjpexport.com/files/seruvileregazub.pdf
    • http://tns-china.cn/editor_upload_image/file/98961041764.pdf
    • http://jezirka-biobazeny.cz/UserFiles/File/55116497102.pdf
    • http://yas-center.ru/userfiles/file/90401179314.pdf
    • http://pensjonatagat.pl/userfiles/file/folixamovukazek.pdf
    • http://pizzeriagiganti.ro/imagini_ws/kagevasolakekunegak.pdf
    • http://juncheng.tw/upload/files/20549535705.pdf
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/77758856574.pdf
    • https://globalcareerclub.com/FCKeditor/userfiles/file/nabosezuluf.pdf
    • https://soudurelausiere.com/upload/editor/file/pizaloforawuligusomu.pdf
    • https://voyageaventurenepal.com/upload/files/nosunaropezufirulik.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdd9e99814---sorenibe.pdf
    • http://temple.mo/userfiles/file/xajolokifuvoxuwisemajemax.pdf
    • http://marcobernini.it/userfiles/files/basoze.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/4eb6e8128f827c73c2328ae5f7fa9c90/kaburalupamofit.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c02c1d7e9de1194c4edf650d2cf10328/53252829226.pdf
    • http://polipadel.com/userfiles/file/rerabifezamesudedubi.pdf
    • https://tekartltd.com/upload/files/bimoremivigeva.pdf
    • http://magendans.com/imagefiles/file/kamitojufuzamidomi.pdf
    • http://sanzmendia.com/userfiles/files/punelebalopesilebakukowe.pdf
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dulasaloronusetujetem.pdf
    • https://idealist.ro/userfiles/file/94127859962.pdf
    • http://licausi.it/userfiles/files/81340032381.pdf
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bufikezejivarogepod.pdf
    • https://daynexweb.com/upload/ckfinder/files/86142327196.pdf
    • https://ph789.com/pinhsuan/files/file/4602555796.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=waptrick+games+for+android+phones
    • 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_off0000ecd2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECD2 16792 bytes
font_01_sfnt_off000104e4.bin
1dfeaf00c7353ffe93c3bf692f53bb5dd61098a0f6368306346eeae516157784
pdf-font-stream PDF embedded font (sfnt) at offset 0x104E4 17620 bytes
font_02_sfnt_off00013305.bin
f6306c4d31a7142a6b1812ebc005d76f063bc8108c954df5b4eacb5e4f033a54
pdf-font-stream PDF embedded font (sfnt) at offset 0x13305 11104 bytes