Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46afe56e6a60f05…

MALICIOUS

PDF

80.1 KB Created: 2021-09-05 21:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5989d4bb2a45f994f876e4eb0f4cc00d SHA-1: 3d1d69ae0ffbb3fefb1f935bae9bbdecbef7018b SHA-256: b46afe56e6a60f0521d4a644a80dc2ad53c703b3ac95dad1a4c006a47d101429
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm on disposable hosting, indicating an attempt to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, suggesting it's designed to conceal its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://scavilecis.it/userfiles/file/jotodobov.pdf In PDF document text
    • https://blogsma.com/files/80420490934.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57fa49a765---vetiwilibitexe.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ce34c29b7---69646851673.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/pujedirifigupikog.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/jerogosekitaboduruvatola.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da6de5ae7b---bijujojupozepabubire.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/8ojm3a1rii1rq72pb2f4eei6pk/viwotugetudukixokawowam.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/141500459127.pdfIn PDF document text
    • https://mfdesign.hu/files/file/bovapudufigogowipusi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/ddb626427c556dc5700fa3f82d509fb3/gekirikulafipabe.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/66262091385.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/4d04c53ea27be164da7ffb7071b4fb54/24232121559.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/72209087390.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/gipirelirirug.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/bidazefonur.pdfIn PDF document text
    • http://njxinbell.com/upload/files/62297476547.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/5f7b9e07344d228826aefc793638489f/ditepawapipumilowilut.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/8751e4447c36c844e215c12540366331/fopibizuvekakeborubowofa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fec9125c8b---zovavuveretezozimisub.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/9318710503.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/leram.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/xivewopubejebi.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/86825609153.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=who+am+i+quiz+questions+pdfPDF 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

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_off0000d5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B6 17168 bytes
SHA-256: 562d797d07f4ba4441fba3ea24ca774c9d403bf8921132c59d356c82eff35d1d
font_01_sfnt_off0001019d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B4 10916 bytes
SHA-256: 01684cba31ea74fd062c798fb0b9276be38c10ae2841de247985cd89742db5ac

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