Malicious PDF — malware analysis report

Static analysis result for SHA-256 080fdd1f1f26bbe3…

MALICIOUS

PDF

71.1 KB Created: 2021-08-09 12:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 848a027d97528e97fc54ee92ee8382e2 SHA-1: d3d74fcfc0de300be1ab3e2192b03cee15162971 SHA-256: 080fdd1f1f26bbe3232d4976eea6c21ee9dc541722e2c775311badfed4e6bb43
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or downloads. The file's structure as a link farm on potentially compromised infrastructure supports its classification as a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://huntic.ru/uplcv?utm_term=converting+milligram+to+cg PDF link annotation
    • http://saltokisport.com/uploads/files/jekisogigowogizenoxese.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a9dc9f77b---mixosozixonisig.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/16494520997.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/13331deb6df700acb479d83a9db90fd5/suzexurutixoxulet.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/81054100082.pdfIn PDF document text
    • http://kuppersbusch-center.ru/uploads/files/vufagodo.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/d8a81e5055b4bc0cb39637e410e1cab1/nejukodakuzetagok.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/zexasezalo.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/81e3577a683e8f0b50e9f3eb71653445/16287595670.pdfIn PDF document text
    • http://hibertek.com/image/files/20210802_170006.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/032d12cef5f3936ee4dc3de095d8eff1/zodevega.pdfIn PDF document text
    • http://m2m2design.com/userfiles/jufuzomidape.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/88707355056.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a6c0585d6---samotititakukabutejuker.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/53579540524.pdfIn PDF document text
    • https://topjobsnepal.com/ckfinder/userfiles/files/58726057112.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/4347bea4d868f9589210ac4a2fcbb664/zajefosasorovobupubexex.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffd5691ad6---25904371051.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/85226870f4ccec6d62c34c52fa975193/nirifovopifisiwiwefojow.pdfIn PDF document text
    • http://ues-rb.ru/themes/ues-rb.ru/files/togen.pdfIn PDF document text
    • http://zlato-stribro-investice.com/upload/files/24737367473.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac27f88970---29693326147.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_off0000b94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94B 10500 bytes
SHA-256: 30c825d7dfc48adcc0e779d3ac8f10354f36d657e66a180209643bd55446074b
font_01_sfnt_off0000d138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD138 14692 bytes
SHA-256: c1107c1d1b76d1a2ce27df9c7764424bbc69af2cbea3acae5199907bf7b12766
font_02_sfnt_off0000f62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1