Malicious PDF — malware analysis report

Static analysis result for SHA-256 09476d68c127ed37…

MALICIOUS

PDF

78.9 KB Created: 2021-09-05 14:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 428075508706e1ed3d6514465974f44f SHA-1: 54ad1b3f15c6b22c1fc10ed2ac67ce7ff3862764 SHA-256: 09476d68c127ed37618ca8f14ad21da29887fe627dc8576aac475012f60ca5e3
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 trojan. It contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable binary data, indicating it's not intended for human consumption but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160721921d7a3b---83988074226.pdf In PDF document text
    • http://fouladsazanco.com/Upload/file/bujogufazuwezixitesozifa.pdfIn PDF document text
    • http://lasermedia.cn/userfiles/file/lekupogi.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608097eaba9cc---6767529318.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607531d56fd41---rekojatowur.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4cb5674ad---32223590105.pdfIn PDF document text
    • https://songhong.info/userfiles/file/finuk.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/vakijabikixuvibefudolejaw.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/69038224837.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/e68dc37117d7cdbb60079c9e346c693e/18661880351.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f3bbbb775---73239596151.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/26377189146.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/fl8i1fkhsfi05vmg8kbfh61ll4/jepuguduxafikax.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160739e16352d2---xuvisezeravadifogalugali.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/15428797027.pdfIn PDF document text
    • http://poledance-chrudim.cz/files/file/zuxovevetoserigesemonere.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/74652756059.pdfIn PDF document text
    • https://computerzone.pk/file/61343276961.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2b927862228410d2d5e6a7a65f42c917/88991738656.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/xofafatesa.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/a96b56395f173f7597f161fa50020117/57819248080.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/mutotijofoji.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/dadivivimur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=adding+fractions+with+different+denominators+worksheetPDF 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_off0000d069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 16660 bytes
SHA-256: 839e22baff36093bf45a4f73a6f816c3cdffacc043b2868d5127544351c84df9
font_02_sfnt_off000113c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C6 11036 bytes
SHA-256: 81ca0522c434e254a2774f1b4808624d880eb08ac85ff7d47fd18f1d81727aaa

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