Malicious PDF — malware analysis report

Static analysis result for SHA-256 868286935bf49529…

MALICIOUS

PDF

73.7 KB Created: 2021-09-05 14:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 023457449459a72c4c4c0492ea3308ea SHA-1: 0a8919061ced6aed36a518e741672c389e2056ab SHA-256: 868286935bf495294dc9b6c8f4d0be393174d5ab7a5e03e1f69f99868774333d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics reveal the document functions as a link farm, directing users to multiple external URLs, many hosted on compromised CMS upload directories. This suggests an attempt to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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=adverbs+modifying+adverbs+worksheet PDF link annotation
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/72a5657414d62512a5feda61296c9f7c/pagazigepepilovuroxuwuli.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/7f7ddcc29eec03e66c9b8af67a1ca1a1/fidagalirunijota.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/75747693470.pdfIn PDF document text
    • http://leguido.net/files/nupomodela.pdfIn PDF document text
    • http://chemicalengineers.ie/images/20477024791.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/5832867812.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/lekagagu.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/lofexaramilorirej.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/innrk24096351opdruic37qq70/rofelokurasijawewizu.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c0de81602---41787210740.pdfIn PDF document text
    • https://iasvn.org/Images_upload/files/85844519857.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/metotujenaji.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/donitukorolazajile.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/pebivozelumagi.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/3kn4dltid4bp44lt21sn6m81q0/sotexetadejexunadivafo.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5302f1d4ef---53706215441.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/42602203090.pdfIn PDF document text
    • https://ruedi-leuthold.com/userfiles/files/50760787143.pdfIn PDF document text
    • http://broadmoor79.com/clients/864886/File/kejoferadewafuvukatewuf.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/e1e40514fd4ed69c61a9c9f57c2b1aaf/59967449198.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3d9b37976---61178613772.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/momuzuxapedagijudi.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/78505674574.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d599eb97d3---48873380903.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9e4587690---41343673621.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_off0000bd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD2C 16204 bytes
SHA-256: 49eb71004e0821e3ff1c2803e8abf253a9cce3a428e7bc03d43437f61d9a9524
font_01_sfnt_off0000e6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BA 11232 bytes
SHA-256: c46a38eaa504e9d1fa5082844fab55cec2349ceeac2db8a77302b417e89f08ea
font_02_sfnt_off000100c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.