Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefbc74c26e1ec32…

MALICIOUS

PDF

84.3 KB Created: 2021-07-01 19:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e803a368f397a22a13b542d00ab63983 SHA-1: f9aa7e2c1e750a5619a788a2022b1409f914b5ff SHA-256: fefbc74c26e1ec32e925e11b07846386e9ac97445dbda17b43f10358078ba51d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://garglob.ru/uplcv?utm_term=macbeth+answers+act+3
    • http://mmckno2010.zkosuchdol.info/files/97128142577.pdf
    • http://tencanpowder.com/d/files/luvafigatovizopitedubox.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c5beee4a88aea76c31dfb155c6ae128e/10901302507.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/5a187c9c6031ab2d28dd1b3a8510b556/gixitopog.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c8b411ffc---60669803204.pdf
    • http://kiemtoanhaiphong.vn/upload/files/65758561871.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e79b634174---52306220795.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160987d8e854e8---7211814484.pdf
    • http://wallsfamilyreunion.com/clients/876683/File/46972140419.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/c1d772756a59a3581f7a0f319394d605/bibibip.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/d0b4db5d618f21af30d598d83b1aaf0c/1515340535.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d2b3e1404---9581295057.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a32d7af2032---rexiv.pdf
    • http://opusincertum.it/userfiles/files/55927990702.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160731a47d0aa3---wadifuduwekigujaroxobum.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/7c51b9b65529c6d3880c4903e6ea1366/33821281953.pdf
    • https://floridainvestment.cz/files/file/xuvavosulaloma.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608463a4a0165---3406240750.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16098618e19dfe---13510077097.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/0c87fc70041f86ad780b3a590c1075eb/23609779492.pdf
    • https://anandamsanyal.com/userfiles/file/61690924245.pdf
    • http://al-bandak.com/userfiles/file/87928778702.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/s7kt5au22v96gdnv2m64rj2lqi/4914077147.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074b3b1816a3---43556524546.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e812.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE812 16792 bytes
font_01_sfnt_off00010029.bin
292b4671910fcd23916682b45847d2bd726d8d1c419d2a529810c53d7aa638e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10029 10460 bytes
font_02_sfnt_off000117fa.bin
bc7890c333e1aeda82e9e756ffe420007ab7b26f112e965d80f17905aad08f05
pdf-font-stream PDF embedded font (sfnt) at offset 0x117FA 16956 bytes