Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f9c7067fab1916b…

MALICIOUS

PDF

89.9 KB Created: 2021-07-03 00:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef189faab8b3b13343a930a6b9d1fda3 SHA-1: 441113b29ba56311603dce3f075e4f1b99a762a4 SHA-256: 2f9c7067fab1916b8cba10087fde3998e333c64d0e4a683d44fdc9b211f88a4f
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous other PDF files hosted on compromised websites, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely part of a chain designed to lead the user to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/44a12830edeffb00d4eb5ed6740c907d/mowumedogoza.pdf
    • https://mattress-leader.com/media/tovemukuzad.pdf
    • https://nhadatonline24h.com/Images_upload/files/gimisazoridiso.pdf
    • http://cana.vn/uploads/userfiles/file/33826314627.pdf
    • http://botosani.ro/img/uploads/file/84239575727.pdf
    • http://qkmedica.com/uploads/userfiles/file/32762786305.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095917af34a3---bimeselonuzewe.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2e91e33fb09013b8ae0101b579bd043a/14283463846.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/6rsic1uiifdsb5krihud9bo0mb/90088799143.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071742621719---tufokuguwozevu.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb251ee82c---vugodujagamimidax.pdf
    • http://chingyi.tw/userfiles/files/70680212738.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/h893ouu71kvfnentonc992g26h/56275996632.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091859b7a09a---tovuxidimidime.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/df4b8a39be91555bd994751da4a0f3c8/89805077440.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160dac3e2abcbd---zosekokogamid.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc877529fb---tuxif.pdf
    • https://thuaphatlaihanoi.net/uploads/files/takivexarijupepudodureduv.pdf
    • https://chptravel.ir/data/file/sudarepelujazufajesizuwiw.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/16c96a251f15198745c4300d13f6d7bd/gorizobiwibapefi.pdf
    • https://ikima.fr/uploads/file/rinit.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/9o5l0164krg747g039fqsb1nk6/53494367325.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c870452267---jaxejarupogefosivof.pdf
    • http://healingtown.org/userData/board/file/56109194109.pdf
    • https://gastriklandsbf.se/UserFiles/files/93597439302.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=basic+english+grammar+worksheets+with+answers+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_off0000f9d9.bin
4b723f48aa5ce1a9cfdda908e41b02733f986160949f21038467438f0b1b4a82
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 11296 bytes
font_01_sfnt_off00011418.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11418 16792 bytes
font_02_sfnt_off00012c2a.bin
013883513d82585867b3398642ad027dd123409dc92fed6311da344d0a4328ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2A 16840 bytes