Malicious PDF — malware analysis report

Static analysis result for SHA-256 000d252cedaceb26…

MALICIOUS

PDF

77.6 KB Created: 2021-07-01 11:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: dae379edee5896b14fca96481425bc0a SHA-1: b51222057e5d953fe88ff7999cc3aaa1044f2ce8 SHA-256: 000d252cedaceb26c174d9edf637881b1ad3b69a590db64e7c239feafa01b436
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV both flagged this file as malicious, indicating a high likelihood of phishing or malware distribution. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the link farm structure is a common tactic for redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://amd-export.com/site/upload/file/71480753106.pdf In PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/d0b3e4293e281debf91c24f6dd38f280/54252146896.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/8f818930e31cf3d331c15af7744a3484/29670707106.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0608b0e75789897a598babc734a2387b/25725419748.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/65b8a8bc1e4b4c1d198973ea9f6f56ce/44997049014.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/7gqv10r2264cstisr1qqmhjn3i/walefivekej.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/de2a307972f1e9de2a3be2abbd788ca0/65699224978.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/b3907f39da211439772bb4d15208ae6d/27675577676.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5a33ba8b1---78978719135.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/51734899056.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/v1ujmu8k80dq7s79sm0ktr4nn7/lelufazexelepaxo.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/42d1c127f783b74f7e3102b871c4346d/rokojimedetimosese.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b11e8039b4---46834368638.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6ca049b4a85cb6e1a183d6ef16565f7e/vobuxofigomubitevo.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/95290434234.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/320bea00809d29f2b875aa2841612a03/rusakefogesaxifi.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/xuxejalip.pdfIn PDF document text
    • https://medtek.vn/storage/file/danolo.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/dd183ed6fcc7a2fa5ac9aecf36e926a7/23188227658.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8450986d5---78173305491.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/masor.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/noxobeve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=annals+of+plant+protection+sciencesPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/4b4245f78779d90ca4eb2d7dfad28879/kinuvinabemowubokaxebiz.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D4 10452 bytes
SHA-256: 78c0a7f2aa0a386dd25395030e8dac8bc0d77326ba22e12a149abdc0b6644127
font_02_sfnt_off0000fbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB8 17332 bytes
SHA-256: 941bad4a5b0dfacacd6adb3959d8c0cc3e7a3ea19000c12d59525982323eef13