Malicious PDF — malware analysis report

Static analysis result for SHA-256 013669460ee43c65…

MALICIOUS

PDF

90.2 KB Created: 2021-06-29 04:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5cf880a10d5b14b1a5e0d4d121c58d9 SHA-1: fdaadbbac5325960529409e69fb39040ca42039b SHA-256: 013669460ee43c6532cf8969dacc5b77c51a69c1e2e9a03b463b1ae3a4b4627a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://catamma.ru/uplcv?utm_term=foxit+reader+pdf+editor+free+download
    • https://mwasafat.com/uploads/files/rezugofakobujazekegi.pdf
    • http://sewakendragroup.com/userfiles/file/92941782176.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090c81d25e6e---lafobonakugarob.pdf
    • http://baigeleather.com/userfiles/file/37050113591.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b30bbb4cef3---kuvajoliborelepadumez.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/afdfd6b6ccd932933bf32c85c7a38ec8/47208572934.pdf
    • http://busangh.com/attfile/fckimg/file///2021062503239_621778328.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c20c8b78d2c---sosovede.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2af9a948ae28530e61d63937ab618503/nesinufodoxediluxubaleb.pdf
    • https://foodvellythailand.com/upload/files/70087399212.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/n4ffokg17tsi47njvh8afjbcg1/14372840733.pdf
    • https://clubon.top/uploads/files/36466900816.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/65e3e219f83d4a39aa881da4c10d61e2/pitotukefejomi.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ea858d47c---63069919402.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a36430664ca---78553510736.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/82541f8420d380bc066d9e92509139b1/jatorelavenagigaf.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f418abad7a---vexojoxuwizovi.pdf
    • http://cesnek-vysocina.cz/UserFiles/File/52426822596.pdf
    • https://pfhotel.gr/ckfinder/userfiles/files/rojozekag.pdf
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/jegamuwa.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ae6722b2f---fumoduloxaniduru.pdf
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/84333754986.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_off0000f171.bin
5558cf1b26991993690482805931aecbcd30ca0a97ab6a25a64434cb1e5ba0c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF171 28468 bytes
font_01_sfnt_off00012b6d.bin
22bf923e5a715b049ba3af0bc7cd415d0f86882284ee894c042f8c337f108adc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6D 10488 bytes
font_02_sfnt_off0001436c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1436C 16792 bytes