Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef93c197cd0fd3c…

MALICIOUS

PDF

75.5 KB Created: 2021-08-18 21:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cbc3652e2946591a75711c07a4efdaf9 SHA-1: a8cf877c40593911ed6eaceec017b6713b080adc SHA-256: eef93c197cd0fd3c7af42d997fbb1b5b82d59a729618db91971eb609a03cc8f6
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous compromised WordPress sites and other domains, likely intended to redirect users to phishing or malware distribution pages. The presence of multiple external URIs and a link farm structure strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://catamma.ru/uplcv?utm_term=yaad+piya+ki+aane+lagi+song+download+mr+jatt+neha PDF link annotation
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b6bfe1e10---36436028185.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/bidogesuk.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/50023396216.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/vafuvomuzodiru.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/o0um0k3gqbphkov789rnjqf3fm/zuzajub.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d675dd596---90581853807.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/7d780545c817cbd5dcde1688dd8f21f4/derepofitimuzufuf.pdfIn PDF document text
    • http://ty-int.com/files/files/75023426722.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/xirokiker.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/88658883537.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/fonobowenuwilasobizepitu.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/88649569646.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/9556b25c0da08303eec206de11b3cc84/xarizalafo.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/grfc52vmltanspaqb9r1m17fcf/navababupifuk.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/a10ih3v1d3pk4tofqju2no2vi6/lejetisinavevo.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607699082cbf9---7466834589.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/91576399627.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/831mut2r672ojsf3gimcmad5lj/bilujifaf.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/25944433548.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/7s9e06kr2fk1a8iht2e04opje2/mazekiwizokidosibenobo.pdfIn PDF document text
    • https://mattress-leader.com/media/89901054291.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/6ebe749f71f43dc11ff39c6d320e4aba/98417299767.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608350e3a4195---84787174508.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/49960479814.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_off0000c1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F9 11244 bytes
SHA-256: bf1af942672e23132ac3a33611b4a5bebdfe981a840b796bf1dc757f93f62b97
font_02_sfnt_off0000f3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E7 16852 bytes
SHA-256: 6be31b99fbc0316aeaee725c96157b91711496d643e0c821891d67e1fa97543d

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