Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfeeecd7e2e14b2…

MALICIOUS

PDF

89.9 KB Created: 2021-07-03 21:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac07a49721b5ccfa62474030991cecaa SHA-1: 98512ba55801cc016fd1a49e70ea19153b677938 SHA-256: 1bfeeecd7e2e14b2ec7ac2df450d11dd5276437b69f9c7c1c9697eb7cbfe658e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9812

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/uplcv?utm_term=foods+to+eat+to+lower+ldl
    • https://fablab808.com/nbloom/fckuploads/file/petefuwewus.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/a4633ca7badcdf8516c0d08da5f6c719/xupidumamebelapudiw.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3e1266491---21191872038.pdf
    • http://mysistermyfriendministries.org/clients/85776/File/xezivivuwudubelusebajin.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/oiajuemuun0ip1t7bmed4801n5/97291171667.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/7db78cc6ae8377ff32429f64d797e9da/gapofiladolutamikewot.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/5f98c9ab7a5138bea5d882caf6e2aa42/77957074985.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087dea97d7fd---joduxowasozukifuxibaliv.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00ae2da17---50585607305.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/fst29a6tiedipgci8tjkdh2pqs/74815577886.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/9016aca61c4c0171a426e44ba75e3a98/gediwufixedutijidewo.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/394b073b16fd7d326a62b5b3770d832a/neles.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/5e54602cf31e77b253c3620f503c7c0e/rubolis.pdf
    • http://deurenhanger.nl/userfiles/file/91096130776.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/962a0rh8a7pd37eer5065vr7p0/giseseve.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4f5d7284b---79246351665.pdf
    • http://www.jindatunnel.com/up_files/file/28401619798.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/b16325d6d2c0e60e9b4f724e2d8970c7/rugikix.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608eff14f0d75---39677536604.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/pujue8pnssrr9ni48rf1599dj2/boxoneta.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/233687593463e9fa452f7b19c31a813b/94887297369.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/kt6pr4fgl69tb68dlrvu34pg2f/biwowugufit.pdf
    • http://tecsun-moscow.ru/docs/file/nojak.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/4eee3aa89d1225bbbb849cb4df5a9534/47289983589.pdf
    • http://angelcabrera.com/FCKfiles/file/ropif.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082943ea744e---64851702829.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/071d4babb3dad889541dd521e34ea034/dizizupovopikawozo.pdf
    • 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_off0000fed8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFED8 16792 bytes
font_01_sfnt_off000116ea.bin
1e0de492aad5c9c044609e39599b01ffb107a16010e47cdac9875fa4eb4f3e27
pdf-font-stream PDF embedded font (sfnt) at offset 0x116EA 16556 bytes
font_02_sfnt_off0001420e.bin
e75c040d11e51f3c0ef473594f94e11dffa9ab57565ff141482e4a10e38ff4dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1420E 10108 bytes