Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3fbf79459cdde5…

MALICIOUS

PDF

75.4 KB Created: 2021-01-14 05:34:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 984054c0e328068458db84dfc4f235e1 SHA-1: 568db7735e54ff36dfab8f59db7277afe35f4185 SHA-256: 5d3fbf79459cdde5205a4d5c9136ba9d29ecabd370f203c0477cb383c1acb6dc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/aws?utm_term=badoo+apk+android+4.+0.+4'. This URL is the primary indicator of malicious intent, suggesting a phishing or malware delivery attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient to infer the attack pattern.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/aws?utm_term=badoo+apk+android+4.+0.+4 In PDF document text
    • https://site-1244843.mozfiles.com/files/1244843/lorageluzewokarero.pdfIn PDF document text
    • https://cdn.sqhk.co/pefibovip/ahjjbhj/goodrich_quality_theaters_closing.pdfIn PDF document text
    • https://site-1172900.mozfiles.com/files/1172900/swat_team_meme_generator.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/BYO7whb/96528040331.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/taguxif/65765973995.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/veselupekasolitux.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/5414268587.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/40851990570.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/30571991838.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/titan_plunge_saw_guide_rail.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/tent_place_card_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/mivelifezajigadajuf.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/navidemofipufo.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/bartender_10._0_crack.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8E 5120 bytes
SHA-256: 345243dc8d5962fb7a5cdf74fb6480b4e261d60d80a1accaa7a6f3b57256f301
font_01_sfnt_off0000fc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC17 10672 bytes
SHA-256: 9414f383b8656cdd004436adcbcd73593b4065a259406c1bfb36011190324440

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