Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e56d0ad15458fd6…

MALICIOUS

PDF

86.6 KB Created: 2021-08-31 19:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f21252e3912dcadb2df2986465b1d850 SHA-1: 3f940a6de9afa96745d19de560c009e9ef17e74b SHA-256: 0e56d0ad15458fd660a9e7b6af8a7bb900b199678032ca75f1d52bdc07d7d6b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://allytemp.ru/uplcv?utm_term=pasta+n+more+instructions PDF link annotation
    • http://studiophotosfashion.it/userfiles/files/wewupirirobukawi.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/7e3b81d97d4dd22ef25647028af35acc/65550834245.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/94355213422.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210730191114844.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/gelapibebetoriperoso.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/lezejaj.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/kobebipudadik.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/21695368051.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/zufapaga.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608072fdd54a0---lumifufekobobakajiwusawos.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28663e0a3e---rivibitu.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16123465b1a663---55480992123.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088046f30713---34831559524.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/4555c0b2c3434dc6564d2e59acbe6f4c/dototukadutigaxonipuvufex.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716d51e2e8d---xozafedina.pdfIn PDF document text
    • http://goldenrulelodge24.com/clients/860883/File/xezafabajake.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160894ddb39ae7---8087221239.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/dazugemax.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/54768630732.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/78723917614.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05f995e140---gujulurebunizezagu.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/nanojijewowategefup.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608075c578059---vulow.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/fd373592cbededa2553c220d49bfdec7/34167044886.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/402580317.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7d73689a5---belede.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED77 10448 bytes
SHA-256: 337a5e40aef490139f1ba077a5fc474a2775cefda8db0c7c1694a7f9cccda042
font_01_sfnt_off0001052b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052B 17944 bytes
SHA-256: 7032c85d306297c113c051e3e228baaa745b7222d1dba2088b37d37da1c29f83
font_02_sfnt_off0001343f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1343F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1