Malicious PDF — malware analysis report

Static analysis result for SHA-256 707110d8284860a9…

MALICIOUS

PDF

67.9 KB Created: 2020-12-16 19:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 14a1db6c7d60e25d1428001d5d750e93 SHA-1: ef64d37924acced688ef1b0742f757c9493e5ff4 SHA-256: 707110d8284860a9a6928c34bf3f3b046b6465db9cd9b615a953e26b5442904b
214 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically identified as a known malicious redirector. The heuristic firings indicate the PDF is designed as a link farm, likely to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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.
  • 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=conan+exiles+thrall+food+wheel+of+pain In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_5f8d704d08113.pdfIn PDF document text
    • https://roninuvanajeg.weebly.com/uploads/1/3/1/3/131379749/suwijetimizu.pdfIn PDF document text
    • https://jinokafolamod.weebly.com/uploads/1/3/4/3/134310646/dusanamesoje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_5fd7bdfea0c1c.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/a1ba7279-2bb5-4ca1-abab-defe2641ff74/lost_to_the_ages_skyrim.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/vidmate_android_app_install_new_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0d88b8a-251b-42df-bf57-92ad481aa7ae/district_9_female_75th_hunger_games.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/5722098191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4db4d70-c01e-470a-b953-7cb2448eec97/28716168882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5387118b-ead5-435e-ad5b-248a2a271c54/10421855838.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/short_pump_middle_school_rating.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_off0000cd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD17 5192 bytes
SHA-256: ef76cfcbb4821cb2b9a191903ee216c8fc6ad47900cc34a73b6efcbbab99fa7f
font_01_sfnt_off0000decf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECF 10576 bytes
SHA-256: 8284f126e20143d3b1c43a5c9b9a7d3782f415636b25128ef62290f9b9c38438

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