Malicious PDF — malware analysis report

Static analysis result for SHA-256 3157a7a6a872e630…

MALICIOUS

PDF

86.5 KB Created: 2021-07-02 23:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 64c7d487fb4e4b450beb07ed0b2ca6e6 SHA-1: 7749a7556507eea03460c17e6fb4aabee032c884 SHA-256: 3157a7a6a872e6302775bd9b89b2f9cec86e7ac020377c7314c143b59ab2d564
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of multiple distinct hosts and a high number of links per host indicates a deliberate effort to distribute malicious content or phish users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45b08a4ea3---fobulamegepemobi.pdf In PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/a9ljjorv15btaqatepo8i1pjtv/kilomepexarawufexemop.pdfIn PDF document text
    • http://usmleworkout.com/files/file/zofaliva.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ar9usnealll8hb2lgs95b58qp2/79531736696.pdfIn PDF document text
    • https://ideaoneinteriors.com/images/bulk_images/files/jijexa.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/082333391995.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/763312df706de382e6a8128c4d6cad32/gokosutoxabifuvupufokegu.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/68217789326.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/gupunanetaruvenad.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/k2us8e94rn38esi9d3ojo2co84/93541027056.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/gixoril.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/9922f521f73c9d2d81e54145db96cf6b/72399137118.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/gotizujomamemakeru.pdfIn PDF document text
    • http://fullx.net/files/75662429816.pdfIn PDF document text
    • http://imi.vc/upload/files/jadirawudan.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160708f3c785f4---mafutipiraxosidunibil.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/luzasebat.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/pgaat9e6u4kav0dn5trrutevjm/72939121327.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c695a3679---91679647681.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/jhhhqdl0db2nigopi0d2bivo25/totuliwujujiduxulavigori.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/33868681907.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=medial+disc+protrusionPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF036 10600 bytes
SHA-256: 85fc8374605d64b1c2c1def09082b8cc268b289ef211b6038cb3c566b7c8b0c9
font_01_sfnt_off00010886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10886 16584 bytes
SHA-256: 33cce271f0d95b95df18ee5917281fcae8b90583243a3a64039758ca0de5cbf9
font_02_sfnt_off000133a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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