Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2f47a9d6f616a5…

MALICIOUS

PDF

71.7 KB Created: 2020-12-27 15:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8f61d46690f621f29f48eb71a3055cba SHA-1: 23eec186399f39732d497b8cd8129764a2075641 SHA-256: 6f2f47a9d6f616a5aea97c1940df2f40fea99b31d3172923e2d88ae9a0a6c1a9
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a significant number of embedded links, many of which point to known malicious redirectors or disposable hosting. The primary malicious URL identified is 'https://traffking.ru/strik?utm_term=nick+jonas+diabetes+tattoo', which is likely used to funnel victims to further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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.
  • 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/strik?utm_term=nick+jonas+diabetes+tattoo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4488556/normal_5fad3bf94cd7a.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/bopavi.pdfIn PDF document text
    • https://kozuliwibiji.weebly.com/uploads/1/3/4/7/134705154/82d8bf14517.pdfIn PDF document text
    • https://sotivozorome.weebly.com/uploads/1/3/4/7/134733800/rebevujoxosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5fb308967f394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372377/normal_5f8df8ab6b5bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369935/normal_5fc09c17e1daa.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/netisukozuzuvip.pdfIn PDF document text
    • https://ximilebikunupi.weebly.com/uploads/1/3/4/8/134875253/ginozujorije.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/181512.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/aa916c7b-bbcb-4d15-873e-d406bc6e5b8f/prince_memorial_library.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/todo_list_app_android_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be64f320-d351-4704-81bf-b8370ea04d24/samsung_activewash_top_load_washer_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF48 4840 bytes
SHA-256: fe3927769176065415ae858dfe6303026cf4d0af8e9dfe33d7c3896b958cec18
font_01_sfnt_off0000dfc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC9 10536 bytes
SHA-256: 6712c6ee3fb158e22f34d692c712aac03c51197020fdc4c4ccddeb45abc9d769
font_02_sfnt_off000103e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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