Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd9c70e4a7bcecf…

MALICIOUS

PDF

66.9 KB Created: 2021-06-12 22:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e97feb8d0ae49003830c43a9c53b1f42 SHA-1: 8114cb731569a86a886fe56579e0a72b0f23585f SHA-256: 0fd9c70e4a7bcecf97a5d98d8aa5c7fff0a7528b88b4fa03f58b6ad750d9ccf6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'Crane manual flow of fluids', likely intended to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=crane+manual+flow+of+fluids PDF link annotation
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/u4ef0rdegn6ea7vamb75lg38l3/wupikawegine.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/43f9319f26560c7fbf74b5bda97f96ce/77010942499.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca982c3d99---kiligunozalotafufo.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160992560a912a---nibenojekasiw.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e17adb3ea3---ragukafajus.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e310fd27db---9669912806.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c16e95b63f6---34347544867.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/nekutogosabixudup.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/86d69ae2be8ed233fc62bee8385286ac/zimunevilorago.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e951ebf40---xosuvepanarabolimiditikoz.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/eff4db440cd143293d9002cf1c362b84/31201414952.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/jnm97qdeqomdk7arn64u2euh3n/58133291821.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/e6de94078401d2eae62397275463fa0a/46114571099.pdfIn PDF document text
    • https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/edaef30417d45170cb5acf3389f5b46d/69573103630.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/1c1afc59c70092940cebd00727d52900/fasamebo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA70 5048 bytes
SHA-256: 6a7392bc20c0b8f4c7ea9a7ddb4b1b935e557addc3c82e65a103b838533dead7
font_01_sfnt_off0000db96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB96 10748 bytes
SHA-256: 27b19d3d7672a98c374ce4c5cc7506ae20236d8c05b53d43d9934b6f5b285354