Malicious PDF — malware analysis report

Static analysis result for SHA-256 6993a8b1d11bd2ec…

MALICIOUS

PDF

75.5 KB Created: 2021-09-07 00:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb9eeaf2607cc6f8313a418478f17a1f SHA-1: bc1d369ae3def7b3f839443dbbb9d5816409d829 SHA-256: 6993a8b1d11bd2ec6d299550f1fa9311fa8a2f35e2a439e831ac029f95a7298d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.hgbehringer.de/img/files/files/waxudijugegep.pdf
    • https://etonbio.com/newsLetters/images/file/guzarurofanawitive.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/1e6919dd7f7d1f857df6927efcdab189/2109167961.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160705451e9f5b---20345511474.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/9077995217f334a88ed83f752f379d89/revuxafoneselomobin.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/13ea1687ab0968571da9558c7eb1594b/27178974639.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/hdfracok43j8joeiv0mf3421rm/matomaferijobuwamivuz.pdf
    • https://bisnismedsos.com/userfiles/file/melawemodadetabejotumin.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c103201994b---9450685082.pdf
    • http://biolabsrl.org/userfiles/files/tizisuvuwefebomafeke.pdf
    • http://stacjaregeneracja.pl/userfiles/file/17432241280.pdf
    • http://akkoryazilim.com/userfiles/file/54154512070.pdf
    • http://cosmik-kinoteatr.ru/sadm_files/26363095202.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c05e9fa4c06---xudabot.pdf
    • http://ibtaker.ps/userfiles/file/wusojodagogomuxi.pdf
    • https://dafelia.com/files/22041924984.pdf
    • http://sz-nuoyi.com/Upload/file/2021072521384287192.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/37609b9647adeae15a6136bff366e64e/21130508556.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/9aeb101177f4ee3620e5eb86a6763b10/tarunane.pdf
    • http://ceresasrl.it/userfiles/files/nigeloromanewiso.pdf
    • https://latrinquette.com/upload/editor/file/saxufo.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ovo7ssomotu0vq599evds3cv6i/xulenogegawajas.pdf
    • http://app8itebarandgrill.com/admin/images/file/lowuwawiluweganuzob.pdf
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/59742452449.pdf
    • https://www.micron21.com/application/third_party/ckfinder/userfiles/files/10871348487.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=whatsapp+smileys+meaning+pdf
    • 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_off0000bec0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC0 16792 bytes
font_01_sfnt_off0000d6d7.bin
5dc377e6e0a1256baa85ed4c6ee8350ae339a9d1981512c4c3877cdeeb89b58f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D7 10832 bytes
font_02_sfnt_off0000ef6d.bin
eed33ec66c5b0f635859c47c86552280eb9b138a2f42f30d35ed3cb72bec5dfa
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6D 18640 bytes