Malicious PDF — malware analysis report

Static analysis result for SHA-256 cebe5f4c732918b6…

MALICIOUS

PDF

90.7 KB Created: 2021-07-06 03:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1efa9cb82088d18bce02bdf8f0b33708 SHA-1: f99f916cce0f6085ed9bbcd078fc50c77d84cb8c SHA-256: cebe5f4c732918b6d47ab22abd29b5eeabec4b54eab1b0bec257336dc00515ea
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised websites, likely serving as a link farm to distribute malicious content or phish for credentials. The document's structure and heuristic firings strongly suggest a social engineering attempt to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/f95c8cebb4dcaa8e3c5e703c4f2ecfd8/xuwokog.pdf
    • https://jdrum-music.com/uploads/ckfiles/files/40436991748.pdf
    • https://flyags.com/editorResources/file///98238523745.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/91rjufsqm6n7at7r102jnv6jnv/8622116712.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/6f5f16c22913eb5dcf14fd4e87d53c4e/lugebo.pdf
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/navisizibe.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16085ab4865806---44158728879.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d561e5c60---jobiximolexedakeguzaxup.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608462b3e6962---9114971120.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d03475196---neledanesurefovojo.pdf
    • https://kp-bs.ru/upload/files/48799234963.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078514f80637---wipawataluvegokuvolimobel.pdf
    • https://doluhosting.com/calisma2/files/uploads/lodujebavu.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/3cse3ovi0j4cd38k6deq66oj75/16226653884.pdf
    • http://mjsolankifoundation.com/fck/imagesfile/pafelibanegorowitosevox.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/250dcfccbb5e5e963fc61f1bede35469/roredozef.pdf
    • https://anmoul.com/userfiles/file/wexojerusigija.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/bd7db8a0aaed3efdc2224f949cec1068/18789219693.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/lcel55e9p9bu3n4aj7h1dvm1vp/90988680796.pdf
    • http://alpha-th.com/userfiles/file/remozekamudenuzir.pdf
    • http://sushinamu.com/uploads/files/tovupinotowirarel.pdf
    • http://dietmoiquangle.com/webroot/img/files/87377778538.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f4cc616ee---wizagejopuxurenir.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dc877ad05---mamulexivu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=tugboat+with+barge
    • 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_off0000ffac.bin
fde363a74524b8eb6cefa64f88238e202aa62d654b355a1bbbead75ee651f666
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAC 10360 bytes
font_01_sfnt_off00011747.bin
084af74bf9ab5696868c455b0d63f76d3a2cc257d9bbc389fe45d7487f82993d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11747 18144 bytes
font_02_sfnt_off000145da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x145DA 16792 bytes