Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a299970c5a118fc…

MALICIOUS

PDF

95.8 KB Created: 2021-06-25 14:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25d88518b93f20610efcd69614e4246c SHA-1: 2c4bb3708de670c12fd4f2c6b53b88481ade328f SHA-256: 9a299970c5a118fcacfb6c48f5c9e016cf523a8f0cd2e180a7a8f171c401c834
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains a link farm pointing to compromised WordPress sites, suggesting it's part of a phishing or scam campaign. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to trick users into paying fees for a non-existent prize or parcel.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/b7ruoammt7035rg1osf0518uf4/65918377427.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/f1hd02ot10lhri3r2jfqgodui6/wirusu.pdf
    • http://giftboxvietthuy.com/upload/ck/files/27695461073.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9be5d1ec03---33819999996.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/0136k2jccdc18hcri8qv70h530/92359021129.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19cf025b71---34532615969.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/e94d8e305829d46c5d459ac4ac0da4f5/15415846258.pdf
    • http://scbczy.cn/up_files/file/20210611_182448.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce3854dfa0d---pudawubedufuwarakagaju.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0b808c9a4---gilimojixumivomokurudeb.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/fa2cdaeb18155a4ee770c3ef1307daf9/gesanovasukopuje.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/9qgmd7u04aa4upttts627egudv/bilotugunemekalirogefume.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607763fc256a7---lifetutavi.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084b9d43d941---sokini.pdf
    • http://zoltysnieg.pl/pliki_wyswig/files/30496376336.pdf
    • https://educationindiajournal.org/ckfinder/userfiles/files/65549751106.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4bb4b9cb5---88926837129.pdf
    • https://santchavarabed.in/ckfinder/userfiles/files/94218764543.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=2004+movie+of+the+year
    • 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_off00011198.bin
e3a7b96dcb1814f7abb392e7fe6e456edc914a7006165694e36d9af144ccb32d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11198 18580 bytes
font_01_sfnt_off00014289.bin
e0684c0391c8ecfa1aa1e216b1f9949519a3afc4583be042f4e4f00fa4ad77b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x14289 10564 bytes
font_02_sfnt_off00015abe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15ABE 16792 bytes