Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3c52aea046a60c…

MALICIOUS

PDF

79.7 KB Created: 2021-01-06 14:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c3da8d1d337209225305309c205fcfa8 SHA-1: 981adc8d69932c9be5ead23129c6735bd4ec6974 SHA-256: 4a3c52aea046a60c24274f801fbbf0f0aabf6bdf0f1efdaffd6b438c3f03fa2a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple detection engines, including ClamAV and a machine learning classifier, indicating malicious intent. It contains an embedded URI pointing to 'traffking.ru', which is likely used to redirect users to a malicious site. The document body, though partially corrupted, suggests a lure related to a physics question, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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=what+is+the+average+acceleration+aav+of+the+particle+over+the+first+20.0+seconds PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475874/normal_5fbc65cb39305.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/hdhisqu/dune_kennings_surfer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373769/normal_5fa00d6033004.pdfIn PDF document text
    • https://cdn.sqhk.co/loboremetoxe/fzjdCjd/3d_printed_heart_model_cost.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481831/normal_5fcdcff7b61eb.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/jigSawx/dragon_fruit_bubble_gum_simulator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476275/normal_5feb3ca745e68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459324/normal_5faa54b4d75e7.pdfIn PDF document text
    • https://cdn.sqhk.co/texivewa/ihajbjd/97542064537.pdfIn PDF document text
    • https://xepuxewezikute.weebly.com/uploads/1/3/4/4/134437058/4154717.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/Yhfggjj/lerofoworatazuzupen.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/e192766d-bc13-4b71-8165-eb04ca78b45e/hello_neighbor_act_1_walkthrough.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab1fde5-33f7-4594-abc7-4c0d2ab14455/spongebob_season_1_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62cdf794-17d2-4737-8f15-cae33cf278b6/puteziwaletub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b02d12d-7063-457b-9a0b-65970565eede/irancell_shop_tehran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2989572-b4a7-4071-a712-f2ed7be8f48f/muse_bible_et_terre_sainte.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_off0000f851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF851 5796 bytes
SHA-256: d5a748718121d89dda01bcdacc1b40792fe12204fbc32a9a0b9da7ad028289f8
font_01_sfnt_off00010c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C23 10604 bytes
SHA-256: 3297894e8b1cad63e6faee8b0a8e64f42a2d052629fa6f1e2c90177ee92d8083

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