Malicious PDF — malware analysis report

Static analysis result for SHA-256 e554ff20bee35909…

MALICIOUS

PDF

78.4 KB Created: 2021-03-17 17:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c4adc07dec984dc63bd7ffd3f69e3f2 SHA-1: 63de20935dd7af969569ee7e93c4448354a491ac SHA-256: e554ff20bee35909637656034ba48cd51896fa206a49ca70e553aa8914ae8caa
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to templates, aligning with a lure for malicious content.

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://baarspo.ru/123?utm_term=green+leaf+templates+free
    • http://workshop-fb.ru/70866895333xpiwq.pdf
    • http://topshops.website/weekly_math_homework_answers_6th_gradeseb6t.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b9c23a66-84dc-4fc2-a871-2b7fd1d46278/73942191683.pdf
    • https://uploads.strikinglycdn.com/files/e1afafc1-0ab8-403b-8e1b-93e726bd672d/27869238577.pdf
    • https://s3.amazonaws.com/bisiku/gesamupidawawuresoza.pdf
    • https://s3.amazonaws.com/vosimalume/nevekin.pdf
    • https://s3.amazonaws.com/suzujewa/poxara.pdf
    • https://uploads.strikinglycdn.com/files/8c8b1372-2743-4903-9750-4d4b1c8f7448/how_to_add_a_photo_on_top_of_another_photo_in_photoshop.pdf
    • https://s3.amazonaws.com/kovezux/absolute_value_function_graphs_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/aed1f454-7694-4668-8a3d-17f5cbda2a85/what_is_the_size_of_a_mini_helmet.pdf
    • https://s3.amazonaws.com/levovod/92348760437.pdf
    • https://s3.amazonaws.com/purawuma/59292179648.pdf
    • https://s3.amazonaws.com/vawoginele/84853417551.pdf
    • https://uploads.strikinglycdn.com/files/186dd0f6-25ba-48fb-ae0f-376fda65d838/61740490697.pdf
    • https://uploads.strikinglycdn.com/files/9e342d01-32e5-4251-bc5f-9d9f6f29c1a5/the_book_of_unknown_americans_summary.pdf
    • https://s3.amazonaws.com/juzewojavomofew/dijajoxuto.pdf
    • https://s3.amazonaws.com/purawuma/pofadeveporoj.pdf
    • https://uploads.strikinglycdn.com/files/2dec1ed7-94ef-4cf6-bb1b-dcf609a421f0/what_is_the_best_tea_maker_to_buy.pdf
    • https://s3.amazonaws.com/bexolamabad/8305005197.pdf
    • https://uploads.strikinglycdn.com/files/31bb93b6-4a96-4ee5-bda4-fdc487eaa12e/rejujufidofokujit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f35c.bin
661f4bbc87d017a1acabd564696d9ef0ba34d44593cf131d5e829deec3356d55
pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 5076 bytes
font_01_sfnt_off0001048e.bin
02e312ce72300e68a2f008e4373d2f747dd6f70278dfafec9a83572fbb385e87
pdf-font-stream PDF embedded font (sfnt) at offset 0x1048E 11256 bytes