Malicious PDF — malware analysis report

Static analysis result for SHA-256 576cc8e332d60607…

MALICIOUS

PDF

86.1 KB Created: 2021-07-05 13:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de6b38d5a6ddcb8c4c07f75eed34b2d4 SHA-1: 4e0205252b8711b67756e3f6c52104009fde3f23 SHA-256: 576cc8e332d60607a1927616a336cd614a4c319b9af67bb640cfcbe1128cc486
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports its malicious nature. The presence of multiple external URIs and link farm heuristics suggests an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607e222e02719---18571126282.pdf
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/46af65ae67752257a0d437c96d68152d/66111314119.pdf
    • http://banghetretunhien.com/media/ftp/file/51927407715.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/7f4098398605f134102cc1eecdef5c16/varunujaza.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/t6vcjhes66o0tteiiofdb6uvgj/xedibepala.pdf
    • http://brightwayconsultancyservices.com/userfiles/file/38025013474.pdf
    • http://kashima.cc/userfiles/file/53522221227.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/bndf0pklnnlrae099a4b7dmcc0/55328850591.pdf
    • http://kapsalonvogue.nl/files/file/3987937421.pdf
    • http://askort.pl/Upload/file/luduvoliwedanevo.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/0fd2036b97643f872f506ccbaaa11043/mowiririzimedozokoz.pdf
    • http://iproperty.ae/userfiles/file/42495117109.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9bb18ed01---18788735012.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/103b15dd8fac551bd3b10a9873c41fe1/solunopetetosufojeti.pdf
    • http://dakmet.pl/upload/lodewuvo.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/b8856280a6cd806c632c75f3709dafb3/20968947206.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ce3925dc09e---mobojijudanoreloborev.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607feeeec33f7---pororetawegapaxux.pdf
    • http://twxcd.com/img-aim/files/7775050397.pdf
    • http://hurtglass.pl/upload/file/sijazatekob.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=wall+hack+for+warzone
    • 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_off0000e7cd.bin
af9a3b77a079889adf5e586460c01b067301296289ffc38d1552ded441e07b30
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CD 10304 bytes
font_01_sfnt_off0000ff12.bin
ab1902702baab4676bddce24c321de3dc0efc424ae485f769c703c06242fc723
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 19832 bytes
font_02_sfnt_off000131bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x131BF 16792 bytes