Malicious PDF — malware analysis report

Static analysis result for SHA-256 801ff5bc137f4fc5…

MALICIOUS

PDF

84.1 KB Created: 2021-05-28 09:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 14d1e1a285c2e7384a35d4bdb7c8f8e9 SHA-1: 193db405f36a6bfc5c8fe19f8401b4a5ae5e609c SHA-256: 801ff5bc137f4fc5988be3a0bbf5b79d26f953663b27f9de98d23edd337c9a90
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a callback phishing scam, as indicated by the 'SE_CALLBACK_LURE' heuristic and the presence of multiple links to potentially compromised WordPress upload storage. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the document's structure and embedded URLs point towards an attempt to exploit user trust for financial gain or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dietacud.eu/upload/file/66182494750.pdf In PDF document text
    • http://artecgroupservices.com/imagenes/file/duben.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/63pvevga0t1hisd19tmtu12uta/20487511601.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b32ad0ec2a---tivagisow.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d23224e42---7912842568.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/28843838383.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16074db918fc58---bipiwuvebenarivama.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/no1338q6onu9dskbmfdfvl5ij3/zosamukazapopeboworu.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/zeroviboj.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/db89020437c91d335303a0b36d1547ea/43554350872.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/575c43be57cd5ed9b75c9f2b8e32057d/17015003272.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcb0e6b45b---55009690402.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/27196723021.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a0b08069f---gokobefuxilemejejexakapog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+recover+cash+app+without+phone+number+or+emailPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6F 5308 bytes
SHA-256: 3dc368b60b62556ca97a80fb90b6fdf2110e91ff6f03dd1637082b5c85e33e99
font_01_sfnt_off00011053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11053 10532 bytes
SHA-256: 79e678fcba4af916b8f0bf953ed6119d39ad977ad22053d4f0c42b99d1e6aee4
font_02_sfnt_off00013469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13469 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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