Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e86ff2b2fd733d8…

MALICIOUS

PDF

78.5 KB Created: 2021-10-10 23:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 54d19bdbb496eb41727cfa12c701c170 SHA-1: ce2e8f00a82f4efe0eb555991df039220f70bed3 SHA-256: 0e86ff2b2fd733d8e4f0ef980d06dca16ec70b3c4e8ce1a9f0380830953f4e53
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads or disposable domains. The embedded URLs and link farm structure strongly suggest an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://behbehaniprojects.com/uploads/files/tibobutigaviganewidikiti.pdf In PDF document text
    • http://palestraarkadia.it/userfiles/files/futewu.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/76168389970.pdfIn PDF document text
    • https://ip-pharma.net/data/files/78734225205.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/tajasixufujutevisariz.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/drukk19br1s01tjd61ec2rg5o0/62365080910.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/27869053376.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/zavibudafutadamolavem.pdfIn PDF document text
    • http://silverk.ru/img/lib/file/63209311924.pdfIn PDF document text
    • http://mlsite.gewoozee.tw/custom/file/91502823285.pdfIn PDF document text
    • https://get.belonnanotservice.ga/away?/wp-content/plugins/formcraft/file-upload/server/content/files/161557d4ca4a77---wozewufopolowixuxur.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/buserisizelojovusafabav.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/89321668783.pdfIn PDF document text
    • http://nwatchonline.info/userfiles/file/tuwijadisoboguviguw.pdfIn PDF document text
    • http://kammerchor-lindau.com/file/8806189482.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/depof.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/74728902747.pdfIn PDF document text
    • https://svltv.in/userfiles/files/modelokegigebisubu.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/16752079941.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/12260561162.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/005db92f46ab0a0ad4c2cdf8f62663df/mifelegemaguvetakafabe.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1615052ebe0bd1---sogufunijipetigefujuzagas.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/96459846580.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/biliwofojizixid.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-6/20210906123144432620.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/6dd57fa182c79a04cfc48505bf3ab313/javuxoremir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=guffawed+meaning+in+englishPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000beff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFF 22932 bytes
SHA-256: d18825b059d17c86238355cd236012779fbcd6fc47115cf90fd5a2ee2162a720
font_01_sfnt_off0000fa5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11275 10708 bytes
SHA-256: e0df36bac43cbf39e344fa044627694234aec0f8bb206cf39d363333294302e6

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