Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c03560b36f4bda…

MALICIOUS

PDF

66.3 KB Created: 2020-12-16 23:33:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 169b7755efad03034fbdb6484488a026 SHA-1: 8fad0fdbdf3525624054c04e583170a709b29427 SHA-256: b2c03560b36f4bda2949849544c5575408a5833c6c3a28b4094309d6d0428600
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 'traffking.ru'. This URL is likely used to direct users to a phishing page or to download a second-stage payload. The ML classifier also flagged this PDF with a high probability of being malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an intent to lure users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9883

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://traffking.ru/aws?utm_term=sulphuric+acid+material+safety+data+sheet In PDF document text
    • https://jimagofer.weebly.com/uploads/1/3/0/8/130813953/jiladux-fatowoxev-lebamomumarim-piwifakixem.pdfIn PDF document text
    • https://fiziwiminika.weebly.com/uploads/1/3/4/6/134686918/laxonefidago.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9bc8a5f-7183-4bff-94a8-1f100d426286/secret_of_the_dry_bones_shell.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/nogusazumakuvi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd08bf1491241adc4733c4/1606224063349/7574920874.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/tadodijopiwoperugoxibe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce9a437ba8b13540f2db0e/t/5fd72a5a5488895576c55c55/1607936603249/tusosan.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/honey_do_handyman_services.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_off0000c5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C7 5600 bytes
SHA-256: 52844e1aa2b9af74f8db5eb09a7f4cb7f4a465503cfe34099ddc289eea638578
font_01_sfnt_off0000d8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B0 10636 bytes
SHA-256: d58d7008cdf9fc3208ace2fa208c3fb27ce6ea14594950fe789c5495ab546a9a