Malicious PDF — malware analysis report

Static analysis result for SHA-256 798020603beb561c…

MALICIOUS

PDF

89.0 KB Created: 2021-07-29 23:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 463739e8c5acc4849aac124446ab7538 SHA-1: c3990deaed1468230ba35f62ee02c39726eb3cfb SHA-256: 798020603beb561c12a9e2432f0f7bdac19bdac1b86f3accc2b85ddd4576cf83
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to potentially compromised websites or disposable domains. The primary purpose appears to be directing users to external malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://suapaiatuipelehakefamily.com/clients/80707/File/lukaniruwizasudif.pdf
    • https://vildmarksjagt.dk/userfiles/file/kuxarumanefinizatufebired.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d629906b8e---xederonugelepawaze.pdf
    • https://waroproject.com/file/80025892941.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf6779f0b1---wabegadololovalo.pdf
    • https://activepymes.com/pub/file/70917750628.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/7afebe2f9efeeb05024ae1ffb42b2500/jabegitadaxuzejezave.pdf
    • http://longchimvac.net/app/webroot/uploads/files/1527496376.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091130f1f981---99550284383.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16075e3211a433---kekotovafitinivuluz.pdf
    • http://rld-carbon.ru/file/pusepid.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/3792c05965ca2fc8e6e1fc326ff39474/vutusuxerotogesi.pdf
    • http://sportsgarten.com/editorData/file/4575521327.pdf
    • https://cupanghitam.com/contents//files/18752650438.pdf
    • http://polymer-optix.de/userfiles/file/21522588313.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/c9fded09036f9b62ff4f5034ddf38862/zamizoriw.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785c0198c6c---rupogik.pdf
    • http://geteffective.biz/uploadfiles/file/savagezojuni.pdf
    • http://peneleos.pl/userfiles/file/8245459912.pdf
    • https://sport-jicin.cz/dokumenty/91481120734.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/d853707ff4bee15d2abe95e027ff2426/94466005316.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160754708e7a33---23040083142.pdf
    • https://myphi.biz/nbloom/fckuploads/file/15530894398.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a54f788e487---zajorebifukavejejojizi.pdf
    • http://tznjl.com/userfiles/files/noditisufusas.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=modelo+790+c%C3%B3digo+012+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_off0000f2ff.bin
bb78456c2c751cb0065c3e8588d368ed5ffac28cb649115a5f706df3447a5bd8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 18416 bytes
font_01_sfnt_off0001226f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1226F 16792 bytes
font_02_sfnt_off00013a86.bin
36c5f1a93451f88add33426d5c052b6716d23aa7888a4fc6952444350eebb7e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A86 10808 bytes