Malicious PDF — malware analysis report

Static analysis result for SHA-256 602f92e8f6fe13dc…

MALICIOUS

PDF

78.9 KB Created: 2021-06-27 22:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dc0242d29bed03736ce17021a1154a1c SHA-1: 903e6fea97d410853224b95b5b1a3ab325bc6255 SHA-256: 602f92e8f6fe13dc5acd934e8106f2f055acc30b15afe516a28af1dae1c4dee4
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely serve to redirect users to phishing pages or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b34806ba46641bf8969017f97ac165a2/92275187733.pdf In PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/b0bfa0e723d57b29a6125295658bf0ee/piropixodoke.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2c9c17e81---gapali.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608137e0902e0---bifanupikejevumokebemori.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608449668faae---16749932959.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092992839e39---45970437765.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087af77dda1b---jopepotiru.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160872253afd41---manamutolef.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d243fa21ba2---9294580490.pdfIn PDF document text
    • http://test888.org/uploads/productsfiles/20210625062221_dae7c.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/7cf8ecd0cbecc5eb5fd9a91d3b53e276/32912754653.pdfIn PDF document text
    • http://happy-travel089.com/CKEdit/upload/files/xujigetir.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/24a98e0472e34104ef1406f42edafd56/mugam.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dfb1bc566---nuxuputip.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b44ebed60b2---61961076639.pdfIn PDF document text
    • https://bloomeng.com/uploads/28869129583.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083387172bad---50782915211.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d1e19fb21---6461135073.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/97a1c419f32db2a151d4bc38b17358c1/jaxolaliwufozetodevujafu.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/20237930511.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/21388910485.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/rorimiwemozax.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/50885208824.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+many+pi+bonds+are+there+in+a+triple+bondPDF 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_off0000cfa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BE 10988 bytes
SHA-256: f1490414ed209afa240f1d6b3003a180a8daa7f9c0f297546cad0a2ae949e607
font_02_sfnt_off000100d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D1 16788 bytes
SHA-256: 73348b221803a418fae5b5945e6b43081dec787e865b0617a5e6d686174da608

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