Malicious PDF — malware analysis report

Static analysis result for SHA-256 986855535c61e697…

MALICIOUS

PDF

65.8 KB Created: 2021-03-10 10:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca316b6482a9dde610a571c63a01f76f SHA-1: 6659fcdc73291db390bb703e09e8b5bd7abeb043 SHA-256: 986855535c61e697637a0c49af725a8aafca69a654d6671c51bf2d47faf910bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics as malicious, including a critical finding for a PDF link farm. It contains numerous external links, with the primary suspicious URL being https://soxebez.ru/123. The document's structure and the presence of embedded links suggest an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/123?utm_term=cassiane+amigo+esp%25C3%25ADrito+santo
    • https://mibuxinuk.weebly.com/uploads/1/3/4/7/134753888/dfd8717d.pdf
    • https://koramuxojenaxer.weebly.com/uploads/1/3/4/7/134701110/7867885699ed96f.pdf
    • https://junovolosexev.weebly.com/uploads/1/3/4/4/134467690/c79729c5f9874.pdf
    • https://cdn.sqhk.co/bebumula/b1YNnhe/.pdf
    • https://ruvesupiranaduk.weebly.com/uploads/1/3/5/3/135314660/zemelepa.pdf
    • https://cdn.sqhk.co/lubometusoz/jdcjejd/wugekexe.pdf
    • https://mirovufi.weebly.com/uploads/1/3/5/9/135958785/pimodopukiduvuvivite.pdf
    • https://nutuvujupakumap.weebly.com/uploads/1/3/2/7/132740288/fezew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_b870f87b3e334d8da76f02faab019b22.pdf?index=true
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_b2d70e3822164715a289b22f8d67d332.pdf?index=true
    • https://s3.amazonaws.com/jugobimuraje/sogimaxitube.pdf
    • https://s3.amazonaws.com/tejuvonixag/zetudorij.pdf
    • https://s3.amazonaws.com/xasovewipeje/barbie_games_offline_free_for_pc.pdf
    • http://dorofudi.epizy.com/kerilurodojipobumunifok.pdf
    • http://belajuba.epizy.com/grief_counseling_techniques.pdf
    • https://s3.amazonaws.com/towutoginadivu/best_ingenuity_baby_swing.pdf
    • https://s3.amazonaws.com/rozebofukixus/sulapanogasotulo.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c444.bin
9d1b8183d0163f247c82a1e2635a7b85bc0068644a282128885ee48ef300cdf0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC444 5068 bytes
font_01_sfnt_off0000d571.bin
dbffb3d5eefd1d4f23c91d1e2717d603584362f41a68d1480d9edd1220fb0008
pdf-font-stream PDF embedded font (sfnt) at offset 0xD571 11088 bytes