Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dbb9b81dd1ec24b…

MALICIOUS

PDF

74.2 KB Created: 2021-09-08 01:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 38ff4a3667c555587d13950dc09b12c3 SHA-1: 3be6cc5ba7c788aade3640ca700252408cc9646c SHA-256: 9dbb9b81dd1ec24b297a9d23d18c306a11ee2e89945facf568b8f14698727632
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution vector. It contains numerous links pointing to compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://allytemp.ru/uplcv?utm_term=bmg+labtech+polarstar+omega+manual PDF link annotation
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/u6rramef1p2fot4vfkt19cl2rs/jagazuz.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/lerolubusisajofalepebosa.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731117c8195---42487904084.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5ddd08b6b0949db9f1d64b7250b1f751/33153952465.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210810014804.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/30919438b4efdef2984ff1532ef57f41/1611531664.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210608024510.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/kuxusatiratelirerifofuw.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/80481925381.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/musajapivikuw.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/fuxuxot.pdfIn PDF document text
    • http://karinameal.ru/imgdish/files/79624310609.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/24523806554.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/27972452548.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2035956a---rulibu.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e904d490466---63469129763.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/99879729092.pdfIn PDF document text
    • http://dhs1959reunion.com/clients/871764/File/tibitotuviji.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/zumop.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/mivopo.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/5294109878.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16085eb01462a1---86944325699.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_off0000bd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55E 17416 bytes
SHA-256: e55803fc4297d5198ab0cda29ab0cd6480f7de4c414ee486f65e4dafe6988cda
font_02_sfnt_off00010201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10201 11024 bytes
SHA-256: a17f7baefbeb5a52221787cb4be258e4b17c79830fe5cc1bdaed4d62c5715720

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