Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ba56d16bfc7650…

MALICIOUS

PDF

86.7 KB Created: 2021-06-27 11:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4428e25a2797bd13afb82eb0b7fe856a SHA-1: 756d91ef8426cd94c2d1078ee5be34216bd9c845 SHA-256: 80ba56d16bfc7650b54a3da78c32fde46b5227b2108bcf0cc33152656ea302eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by multiple heuristics and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be directing users to malicious content hosted on these external sites, likely for phishing or malware distribution.

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 https://philabc.ru/uplcv?utm_term=eggshells+on+orchids
    • https://thai-airpark.com/ckfinder/userfiles/files/xisetazetizagiwuje.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075eafe5b516---mepepomol.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160738fd8d9760---547387578.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160b15424b20d8---11683392644.pdf
    • https://accuratesearch.com/userfiles/file/xivogunixutakulisarufoj.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5454051841---40222618266.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d5e5a5ba7---4255681950.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf9d896993---9167109834.pdf
    • http://thedewakohchang.com/image/upload/File/avewinotekimofiluxiwajap.pdf
    • http://martom24.pl/martom/userfiles/file/kobezipedajujakew.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726024e1d06---zezowotuxunidila.pdf
    • http://www.asslar.de/downloads/44948758433.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a24554c869c---70401230398.pdf
    • http://lateonsettay-sachs.org/userfiles/file/minibu.pdf
    • http://metaglas.kr/userData/board/file/83041963126.pdf
    • http://3bbb.fr/ckeditor/upload/files/kixepumoxulerezojeruz.pdf
    • http://artospace.com/pics/file/30688305208.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609474c47d3b7---sotijegolosaxejexibel.pdf
    • http://yuanyoujie.vip/userfiles/file/22721525564.pdf
    • http://aliceinformaticasrl.com/user/pages/19852375058.pdf
    • http://humanlitech.com/files/files/57499135207.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd7fc5ee24---xobomazaj.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_off0000ef8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8A 16792 bytes
font_01_sfnt_off0001079c.bin
1e3495cb00cf1475c13aea8923827147f65a9cea0b156b4c5b21934626d3baac
pdf-font-stream PDF embedded font (sfnt) at offset 0x1079C 17516 bytes
font_02_sfnt_off00013561.bin
93a92cd960419b0c8fd24e1c5c15f3127c4823853bdd84143b70384958d40c8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x13561 10372 bytes