Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1149774892e7c3c…

MALICIOUS

PDF

71.8 KB Created: 2021-09-25 09:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 46e825621dddd60a95ad50b6e5e20431 SHA-1: bc994c7287a2d9af9134dc26f2ee64cfeced7f79 SHA-256: e1149774892e7c3cdabb9144bbbc0eaed51358ab928bd2ce432e56fc9b83c5c9
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised websites. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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 http://amuseonline.com/absite/userfiles/file/34891544851.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16143e4e7c76f3---82272696749.pdf
    • http://kingbikeonline.com/images/upload/File/63148512152.pdf
    • https://holcom-solar.com/webroot/img/files/35491749355.pdf
    • http://quincy.pl/ckfinder/userfiles/files/karaleruserapatinef.pdf
    • https://maytinhdalat.vn/images/uploads/files/70321368965.pdf
    • http://wtmongolia.com/materials/file/bepulosunepix.pdf
    • http://conomiya.com/images/uploadedimages/file/82612560578.pdf
    • https://turismopontevedra.com/ckfinder/userfiles/files/47917813188.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419a5dbdc70---muzovotuwipuvoburuwasejom.pdf
    • https://solucionaesp.com/ckfinder/userfiles/files/jomakewewogulopame.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614bc58a9d618---25620912500.pdf
    • http://maivietnamesecotati.com/uploads/files/sulusukewovawule.pdf
    • https://yukkumpulgroup2.com/contents/files/tatokugivuzasurit.pdf
    • https://hinodecoder.com/userfiles/file/tofodibivurasenavopak.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613bace99f2fc---75200820286.pdf
    • https://mgrenginiai.lt/ckfinder/userfiles/files/mirubufatoba.pdf
    • https://hogozaty.com/ckfinder/userfiles/files/vodevorepezojoviba.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/161438ce0003a4---vepepewakigizok.pdf
    • https://cncunse.com/d/files/33209150622.pdf
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/jowulumisozovopisonipe.pdf
    • http://fc-junajted.com/upload/datoteke/tozoduxadapibutamisupus.pdf
    • https://travelone.ae/userfiles/files/xunit.pdf
    • http://bajkolandia-leszno.pl/userfiles/file/76685730660.pdf
    • https://gruntbudowa.pl/files/file/pelukarowu.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/qqu8u588a0v5qkm9qfeqm1v2tr/ziramogelulepojowekubixak.pdf
    • https://onecre.com/images/content/files/dowosabareleluximifa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=app+hack+wifi+password+android+no+root
    • 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_off0000b6f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F4 16792 bytes
font_01_sfnt_off0000cf06.bin
2d7465d38a6cd523db293809ce2d69a4d633be83d6cd97bb1a3a55420cfbb635
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF06 16200 bytes
font_02_sfnt_off0000f824.bin
26859fd5cf1708ac92f7ec7df397768377b05d323dfd460632fbb81d89930744
pdf-font-stream PDF embedded font (sfnt) at offset 0xF824 10696 bytes