Malicious PDF — malware analysis report

Static analysis result for SHA-256 79bfcd1be8a37604…

MALICIOUS

PDF

84.7 KB Created: 2021-07-06 23:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61a2cb4213d525db8d86235e57669705 SHA-1: d0329f8157508518f11a07d2713335cebe8389ba SHA-256: 79bfcd1be8a376049083269b0471b9d634458298316f34800774c6722b3ec23f
156 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting domains. These links likely serve to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://ilovegabal.net/fckeditor/_upload/file/mamovotikonuxif.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7c8eccac3---mefuwakadimaladozebufebuf.pdf
    • https://netshopnepal.com/userfiles/file/xutigewasegetofetepetu.pdf
    • http://pwr-tech.ru/userfiles/file/35807336356.pdf
    • http://brukbet.com/user_images/file/bugenedajubora.pdf
    • https://sieuthimaytinhcu.vn/upload/files/vowuxa.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc82a61957---68847679110.pdf
    • http://cerezolorente.com/files/cerezolorente/_repo/file/rakosuvaguxupedizik.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/b1f373cf37dab09003fe0316d3c8bc02/misolurizebiv.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4429c68084---84329951944.pdf
    • https://sts-cct.com/app/webroot/userfiles/files/lejefowesuvik.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba08b1c68b---90915878654.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/a523a8918033e3095f9e478040c9ab67/xipebelivemexati.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b0dabf3f319---33499633367.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd872a0e0e---9764294268.pdf
    • https://kozhikodedeaf.org/admin/my_files/file/satikoxagagonixegowebiw.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/617e291cea4fe525c7a89bb53ba31e54/luwapakonajakemobuf.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/opgap38jilmb7u3c0nl2strth2/barejalapojonekemiki.pdf
    • http://www.anjhimayath.com/upload/file/38970313107.pdf
    • https://kolbandibileklik.com/resimler/files/83463860333.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/2c3c90c2734698b4bad4e4e7627cdf7d/wigotuwozet.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/0a786b134dbe26b8dc93b6496be0b19b/24671311218.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=mmr+vaccine+complications
    • 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_off0000e98c.bin
e1a63ae95b11d2c05693f681726cc73418a02c20b5203908b57897bc0ef2c3a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE98C 16900 bytes
font_01_sfnt_off000115b9.bin
41434716cdb06d9c6112b637a8e3229269a3582086c4c3b968deccc3d3f477aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x115B9 10596 bytes
font_02_sfnt_off00012def.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEF 16792 bytes