Malicious PDF — malware analysis report

Static analysis result for SHA-256 027330aa17b01337…

MALICIOUS

PDF

88.1 KB Created: 2021-06-27 17:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 149cc59866709c4565499ac1b96bdeff SHA-1: f84d13328ca84040d27264584b5e5ff562ce4a3c SHA-256: 027330aa17b0133750cffcdea9db0ef7762fc82fe6b22f0d04a18bac9123ab0b
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of external URIs and compromised CMS upload links points to a tactic of leveraging potentially untrusted content to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/c6e9a7c33a50c4932159f0b38711134f/41011039600.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805dfdb37a9---zeliregaguwuvilez.pdf
    • https://almuhja.net/ckfinder/userfiles/files/24147082525.pdf
    • http://nature-revive.org/files/file/83248630420.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/27588821405.pdf
    • http://antiochhighclassof70.com/clients/4/4a/4a4d67c83f6236388cbe8d22d68d4f91/File/dipabuxijimorizubinitoriw.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/js6u5ktgi38eiv6fl6f8311qti/wanitujoxo.pdf
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/64094632667.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/9d74370ad5b31e91bc376a96ac7e405f/mobunigujovonuzavuloj.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c568ca93a---54255543601.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/eurc0gke65mlhactuts19hrgu6/33806174068.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/c4339d75a9459eebcb5e3614e47a6e5d/19365699869.pdf
    • https://chiuman-hk.com/images/file/dozumevepojude.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/716hm08td6t9jci1omsur59171/telizamopapanapixoxuze.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/c4lqfpo609skmo70ibafrousbs/bolozunisifubanoliguz.pdf
    • http://haiphongcontest.com/images/files/dazij.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081479f2bb7d---14473270033.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bn0hj4u9uh9f2uqfogevihvn91/turixoralazi.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609be43f17d70---sejogimomovurigajab.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16099fe5f1daa4---dewiwomavalebunuwawiga.pdf
    • https://makenie.com/upload/files/xafokidadekowi.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f004e4e01e---nalesagoforatitewi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=formal+and+informal+social+control+examples
    • 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_off0000f74b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF74B 16792 bytes
font_01_sfnt_off00010f5d.bin
7a9b7a1f5e495cb2993f2ccf965f3b6abb941ea233b02565826afc18171c797b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5D 16584 bytes
font_02_sfnt_off00013a23.bin
513b2ce39a447b3ec4020b6c4e3482f8d6a7d637b957339ba1113b6ca2d1fc03
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A23 10860 bytes