Malicious PDF — malware analysis report

Static analysis result for SHA-256 082860cad73e7f9b…

MALICIOUS

PDF

94.5 KB Created: 2021-09-19 02:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: de018c3a29ab74f618db67ef036a0548 SHA-1: e3238dd8b47c240e768dbf985d8b7b1d5883b5ca SHA-256: 082860cad73e7f9b09edf9a79b76bf6f553f9cc13ae66e8461dd452ea0344cad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, some of which are part of link farms, suggesting a phishing or malware distribution scheme. The PDF structure and the presence of external links are consistent with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://levakov132.ru/userfiles/file/tunipibip.pdf In PDF document text
    • http://kmbb.at/userfiles/file/robidixekuzuvorenemejok.pdfIn PDF document text
    • https://gemicilojistik.com/userfiles/upload/file/61930861575.pdfIn PDF document text
    • http://yipdeals.com/app/webroot/upload/files/rijowiwagufejidib.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210918_A83DF166212A0A9C.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/55802993509.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/fezupape.pdfIn PDF document text
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/lukazegenojarajukog.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/kadukozo.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/33197795766.pdfIn PDF document text
    • https://myagenda.myagenda.cz/pictures/editor/files/xipawamuju.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210913110203.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/kibape.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210914111202.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/18940802597.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/73944700559.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/23384158890.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/72976377198.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c7184bdca---225286587.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/vezatatubasego.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/i4ik93k1eila1pbj3odbtbboak/72692503257.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/85880753905.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/75261403324.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/sugipipitixuragobuwikad.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/64066604659.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/89954596142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=fifty+shades+darker+free+online+123moviesPDF link annotation
    • 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_off000107fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FE 19132 bytes
SHA-256: 68316e2b3d22242dbd09752868a8cfd1b797200ae46ef0265b14375b033f702b
font_01_sfnt_off00013a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15221 11212 bytes
SHA-256: d04c866642d833a9f9e1a3a388a4215bb37ac5d19573b5e5b45eb890439794f8