Malicious PDF — malware analysis report

Static analysis result for SHA-256 614c46a16ba580f4…

MALICIOUS

PDF

111.9 KB Created: 2021-07-13 22:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 48829458b740dcc3b7aad788de5a6d4f SHA-1: 2c4f24b8090c5e927f20da4fc162feecd65568be SHA-256: 614c46a16ba580f4191606d026dc7989bcae57a0f1c6c300269369ad6a5e7be7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

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 http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28d3c27a1b---jijaramiribetowokotemura.pdf In PDF document text
    • http://ersatzmonitor.de/userfiles/file/duzozuvovimavopebe.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/p6kvp4llians5lc43cbb0i1ere/dapofuxivenolagozilimeron.pdfIn PDF document text
    • http://hzdshg.com/images/upload/File/jimalig.pdfIn PDF document text
    • http://ddrwc.net/clients/869849/File/68853650063.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/60839279056.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-4-30/20210430050436811174.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/tetememofoto.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/39034313217.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/3318e8d7070a830443d3825fe2703c87/modesoxazizexe.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160e2f2379e38f---56707341359.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/16af601cdd1ce13fa4c1fbc71bca1b79/virosetidukepenukav.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/10325851619.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/dttcmbnvjrn2mq22r6s05h0haa/buzejadezasemibonar.pdfIn PDF document text
    • http://mths1965.com/clients/6/62/626de2090e8268457c7577d5e8b87900/File/suwixujudezet.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/eojol15sh01eqk1jr3pv3hjdq3/wazajadaravadavudukat.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/niderajamunelane.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec5a6501a3---94925357772.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/56471300419.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/f5d8f6171f079131ac54f95464c47733/ninurowatijan.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf444a72f2---39529841955.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a1509f17b---68046271529.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/juzoduzod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=things+to+do+amesburyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13947 10968 bytes
SHA-256: ae06fbab3fbb72a14ff3462fd8b4d96476569d7ffa64ef95db652c5592136bd5
font_01_sfnt_off00015253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15253 16892 bytes
SHA-256: 7bb558c053dc4e043e6ec2b99395c9865f054a5c24d8cc6c1cc1224a35179b35
font_02_sfnt_off00016a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A0E 18092 bytes
SHA-256: 212b87314d32ef1ba63379bffffda695a2b9a33a8b0e62f627f7635188bccfa8
font_03_sfnt_off000199f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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