Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7a92af4f702c29…

MALICIOUS

PDF

82.8 KB Created: 2021-06-30 01:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e9c2f72f947609d3e75cd718a9cf830e SHA-1: 0a7efbdcf91c89267f1b7e194707ec1196d629df SHA-256: 1c7a92af4f702c29fa12c6bde8c8242962412796d5ba27f64a7742815e61a0d6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs that point to various websites. Several of these URLs are hosted on compromised CMS platforms or disposable domains, suggesting an intent to lure users to potentially malicious sites for phishing or malware delivery. The file's structure and the nature of the embedded links strongly indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pistant.ru/uplcv?utm_term=boundary+value+analysis+in+manual+testing PDF link annotation
    • http://jandenzobv.com/image_uploads/file/xiwinogapovaradelikofomob.pdfIn PDF document text
    • http://policylic.com/uploads/files/58899471122.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///72219993732.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/aqo4cukhpq6qfur3v7meo62e52/bejotajimuw.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f44b775951---gosuxidulenelasad.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/89938852713.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/7nk5gvj2agls588r6o7ns53jts/38726987408.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160cb416f8bc96---wigemiminirigozopekudizu.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff08cb4e0c---52248029759.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a81a1d583c---20252775224.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/tisowomixidiwaxisikapobo.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/a78a53c9f667fb10ba1685b633b3158c/52699638527.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/61839652716.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/798862e0aba0f2f906b3c1d4803f53b0/luxobunesinobupigi.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/268b84c3af1b7bab333286934995f639/boduxovawezolatelimuded.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/45679367073.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/6h54e627dtf46v0l97cqulvpb7/refovuj.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/c1f9cce358d1312842917ea36a0d43b3/87121185725.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/a15900dd783d1836b13c99735207db91/luwiwugoki.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16072d686149f4---tumoginekikusamiv.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/69722747452.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/09d9fc873ff328b508416b8c7fe19895/gosamobarujenirudukekixe.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/78192196816.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_off0000e139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE139 10924 bytes
SHA-256: e3fc74de05509277d5e2430b872e2e9a35790557ef405cca07fd7380ed67b1a0
font_01_sfnt_off0000fa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11279 16636 bytes
SHA-256: 47a1ca47d79d8ea039e1d89e093654535fdd669104701d23b90763f8a01ab156

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