Malicious PDF — malware analysis report

Static analysis result for SHA-256 860b78f0e8f8f078…

MALICIOUS

PDF

86.3 KB Created: 2021-06-30 19:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4ffdd8437aa736fffe2cf5b349a8ea39 SHA-1: e2e68ee0a2013226293a13e92f7b05b783dbfbe5 SHA-256: 860b78f0e8f8f078a8b5f6103aed75357a97a789091b7971b40cb0036a0aec53
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, directing users to numerous URLs, many of which are hosted on compromised WordPress sites. The primary goal appears to be luring users to malicious content or phishing pages through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://crewmak.ru/uplcv?utm_term=chamillionaire+ridin+dirty+mp3+download PDF link annotation
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d99096075c---39084497364.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/pakajitososovujipag.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/72982003763.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/86220175180.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/jogel.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/t1d31io7lmcg9hr18385psddpk/dumegexivutoredijawidopa.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c4544346a1a---96490770326.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c306901cae---veturer.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/bcccb5464a197656cc18c0821773e07e/lufos.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef8ae7def0---62540314935.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/ec176d98ff090dd11667925883268ee5/41894049339.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/031emhb896n4huef0gnm1rrc0g/4566824052.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/br6ta0aoiasnakfs5bkch70bd2/64342218166.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/falafib.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8a901fd76---lunas.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160877810f26b0---zumejujirijimanibubisek.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607dadea1b5c5---meram.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/45940616884.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4948eb6e2b---xutivodarodin.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/93450293075.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/lubvp1o67kdm2ntjj7u50l6d3j/79725409131.pdfIn PDF document text
    • http://irollee.com/userfiles/file/samifukume.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65c19c86ad---63585702872.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

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_off0000ec8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A1 17704 bytes
SHA-256: 9e924f97e56def10336c7550d1a7dd3acab5850ba0729afd1b126763e75cf1f0
font_02_sfnt_off00013305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13305 10892 bytes
SHA-256: 36dd131f40b52839bdd23dab731c5f7ab355912867c016252b22c3ad43eeed84

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