Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0b8376b7585939…

MALICIOUS

PDF

75.6 KB Created: 2021-09-05 03:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c34677d2c9612aefe88aac5f78ab9d48 SHA-1: e0b3c2b87339bd56832ae2531af8dcab586c2baa SHA-256: 2f0b8376b7585939b6bc2e9deb5289e970c79e6bde5f582206ed1b6f8e703af4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates a pattern of luring victims to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://oniceh.ru/uplcv?utm_term=argus+c3+manual+camera
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/4877065ac6cf7757cf0e663fdf038987/10057361477.pdf
    • http://zaintik.org/files/galeria/files/xebotorujapitulad.pdf
    • http://amindoost.ir/images/upload/files/15530303946.pdf
    • https://jmtours.co/aym_image/files/bomopifofamapug.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/df7f7d4a1f7660c819a2e57c49d03f3e/32989060708.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/47d05f03226b3bd66cfa621f174b8c30/90297555778.pdf
    • http://msnladyboy.com/ckfinder/userfiles/files/fajijoboseburakajekigafu.pdf
    • http://vrajacreation.com/uploaded_files/userfiles/files/zopudakuvoweg.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743520767b6---lunaxajebikozakujopikos.pdf
    • http://nceed.kr/pds/userfiles/files/65790401578.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/f6d422cab37be7922300c0af4581ed54/8221357418.pdf
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/lomurax.pdf
    • http://uekekb.ru/!upload/files/wozowo.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/e4j936rrar5p8pasnqqjb6657u/73177335639.pdf
    • http://driver-jazda.pl/upload/file/99924854716.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/plh6id8gf2isu6jkcq40eseml3/zutog.pdf
    • https://consjurist.ru/uploads/files/29381911718.pdf
    • http://crosswaysrecruitment.com/userfiles/file/79069581971.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/r6bglqa9p697a3v7j08a4kahmm/wakafofi.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/kunetababitadetedotipopa.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609486b483f58---36508262152.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089eb1714585---soxigitizober.pdf
    • http://valeneighbors.com/userimages/52598209484.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/qgsotr9d7oup8n32bv9glvrneh/zixavap.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_off0000c57a.bin
15efbe681724347dd81e6831fd9a22c500563684589c31e7920c3f35e8a7f715
pdf-font-stream PDF embedded font (sfnt) at offset 0xC57A 10516 bytes
font_01_sfnt_off0000dd74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD74 16792 bytes
font_02_sfnt_off0000f586.bin
af7bf2a6d78a0dae978cfdd3d27ee4caf6bf5bd52838d53d1c495650bc787791
pdf-font-stream PDF embedded font (sfnt) at offset 0xF586 16708 bytes