Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6fbcd41e161d82e…

MALICIOUS

PDF

75.2 KB Created: 2020-12-21 04:00:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 526c81b087ab406ef92f38540285a24b SHA-1: 52ac5f77fc3800a7b705412f4c2c9fecf18be53a SHA-256: a6fbcd41e161d82e7a11d613c9e962a07564c9a7d1d826ce77f530d4a792abde
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, disguised as an Old School RuneScape leveling guide. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of a malicious redirector URL is a high-priority indicator.

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://traffking.ru/123?utm_term=osrs+f2p+pure+leveling+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4455660/normal_5fc1d721602a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463287/normal_5fc0933052315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416919/normal_5fd7b3d381f90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467004/normal_5fbb2f7f9c030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424683/normal_5f98d36e64651.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/tifuwuw/phool_bane_angaray_songs_ming.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b51b40f1034a5cae9388/t/5fc4c3323c02f22b9da2e4c1/1606730547186/72363597250.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfdc47a13a450babee0d2c/t/5fc2af4b3570fb44d15b2f23/1606594382042/63215119014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c10e827b-9095-4580-8e38-f579464bdf32/robin_hood_la_lgende_de_sherwood.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e7ad6609fd0ee79153f2/t/5fc31b73cb3e0f5771b6579f/1606622067893/85390263135.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf14e647c0a716af0280a1/t/5fdf77967514fb3b7659f87b/1608480663388/smart_tv_remote_keyboard_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9196e758-30b1-4306-88fe-92436b61f85e/singapore_math_olympiad_books.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc187916609fd0ee795caa4/t/5fd081ed3364176a125e078f/1607500275374/names_of_classic_chess_moves.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe32563570fb44d1cd99e1/1606300247537/the_resilience_factor.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_off0000ea0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0D 5216 bytes
SHA-256: f0169e6229ef00674d4c2bc12e23f4b16926129457408d293958adc07e0fdd2d
font_01_sfnt_off0000fbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEC 10628 bytes
SHA-256: 46c0a0dbf83969f383a4551919aeae8bba7b7ac398c6f3ac73819981f0d69469

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