Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3e8af9619a9eff…

MALICIOUS

PDF

70.9 KB Created: 2021-09-25 06:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39c32d11ee38cfa03db14325eff08506 SHA-1: 2da5522483ce689fa7ce5927292f714315052635 SHA-256: ed3e8af9619a9eff832c7de586613ddac64b4cde15fed5d415fbb8d07c2d1d27
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads or disposable domains. The embedded URLs suggest an attempt to trick users into visiting potentially harmful sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://nifaelectronics.com/userfiles/file/beduvekafokavezibadizetox.pdf
    • http://cleangroupbd.com/ck/upload/files/53472325823.pdf
    • https://justforjetscatering.com/userfiles/image/files/45713373351.pdf
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/21927274757.pdf
    • https://sweetburden.com/upload/users/files/90486044755.pdf
    • http://a2kat.ru/userfiles/file/zipirokowulewawilitex.pdf
    • https://vmwarts.com/ecovic/file/59398198980.pdf
    • http://jiji.pgo.tw/pic/uploads/files/sepodizebavepakize.pdf
    • http://studiopedrazzini.eu/userfiles/files/47273467766.pdf
    • http://hongdacable.com/d/files/jipuruxosujabazegiwu.pdf
    • http://laulumaja.fi/ckfinder/userfiles/files/sigiroremipa.pdf
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/pusijukesuwetenejubebij.pdf
    • http://kaiyudachem.com/filespath/files/20210922021816.pdf
    • http://www.udelimpa.es/ckfinder/userfiles/files/67711414716.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/rqj48bscuidgrpfqjhlgh07sn6/bexisu.pdf
    • https://accuratesearch.com/userfiles/file/zasitefifupajije.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f344eba432---89602520395.pdf
    • https://mimpiindah1.com/contents/files/43884388994.pdf
    • https://taxforce.nl/userfiles/files/litulibad.pdf
    • https://sealand-pptc.com/userfiles/file/topufutilesajukoxixaf.pdf
    • http://elijasprojekts.lv/files/file/35076922010.pdf
    • http://kiddeefire.com/media/userfiles/files/xajudumunuzafijisixir.pdf
    • https://felixtrail.com/imagini_ws/kosotonozule.pdf
    • http://allier-genealogie.org/File:/buzesifo.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/c3a3bbfa5ce5924ffa700819eeb14865/lokuxojusumelexitetotoj.pdf
    • https://ratosatu.com/contents/files/27991641087.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=get+out+full+movie+online+free+123movies
    • 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_off0000b273.bin
b9d82fc76455b58bae95bfdaaa2ee27a14da26de58a8090a7bebbdfb4133cb43
pdf-font-stream PDF embedded font (sfnt) at offset 0xB273 10764 bytes
font_01_sfnt_off0000cb60.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB60 16792 bytes
font_02_sfnt_off0000e372.bin
b7c90bea49ac07ced7ba3a3b146e12d5c08e186a951398e45627a1ba69b5a801
pdf-font-stream PDF embedded font (sfnt) at offset 0xE372 15948 bytes