Malicious PDF — malware analysis report

Static analysis result for SHA-256 570c830af98d87c3…

MALICIOUS

PDF

74.3 KB Created: 2021-02-28 08:54:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e799aff3757baacc979b7f68c2cf938 SHA-1: 7c5b44e6590ac1d00d5e472dd1b0e79608a0fc5c SHA-256: 570c830af98d87c32aea901e45c77a2a19a5b9d2851c8826a20fe6e2f231c3a6
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The embedded URL, https://mezovuduw.ru/wix?keyword=fnaf+for+free+download, suggests a phishing lure related to game downloads. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate a potential for malicious content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://mezovuduw.ru/wix?keyword=fnaf+for+free+download
    • https://cdn.sqhk.co/finelega/jchikgg/mukokes.pdf
    • http://figimumagoko.mygamesonline.org/awol_guidelines_philippines.pdf
    • http://repair-foto.ru/zalifajayn5mh.pdf
    • https://cdn.sqhk.co/dedogupazib/OmGNXig/zeus_dog_cause_of_death.pdf
    • https://cdn-cms.f-static.net/uploads/4416502/normal_602d98ffa8c26.pdf
    • https://static.s123-cdn-static.com/uploads/4414334/normal_5ffa97d5d4663.pdf
    • http://mavigawika.scienceontheweb.net/how_to_mount_garmin_edge_530.pdf
    • http://kesuvajeb.scienceontheweb.net/how_to_find_missing_voltage_in_a_parallel_circuit.pdf
    • http://ryursew.space/guwodedaweb9tovb.pdf
    • https://cdn-cms.f-static.net/uploads/4486344/normal_602de1f4e7bce.pdf
    • http://ingmijn.com/vagamikifojololamarivuerib7.pdf
    • http://lelekelosutov.getenjoyment.net/how_to_write_a_brief_law_school.pdf
    • https://cdn.sqhk.co/pivugisaxap/if0sjdA/68958042727.pdf
    • https://static.s123-cdn-static.com/uploads/4374199/normal_5fe5e78d23bc6.pdf
    • https://cdn.sqhk.co/vixuwegijelo/hjNji0C/download_stickman_five_nights_survival_mod_apk.pdf
    • https://cdn.sqhk.co/sunaxidida/jahgljj/snake_xenzia_1997_rewind_pro_apk_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jatoxat.atwebpages.com/48867056369.pdf
    • https://s3.amazonaws.com/sesijesule/welcome_to_bloxburg_beta_free.pdf
    • https://s3.amazonaws.com/wifukedot/dobiv.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_off0000e85c.bin
2a19a3b523e1001cdf8648acdbbc838105fdd1b10ef95257abb81322b4b0b3c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE85C 4772 bytes
font_01_sfnt_off0000f8bc.bin
595757b7d229bffb2b0f028bd9da0e4f39f4caa483c1e32eeddf9c5c6bec9e33
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BC 10380 bytes