Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecd5d2b708a6002…

MALICIOUS

PDF

74.3 KB Created: 2021-04-25 01:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 60cd9b9e670b98f9c92af439a7d24193 SHA-1: 097d8d1cb40c20ef392d8f9f20e24ba7f9ce0584 SHA-256: 7ecd5d2b708a6002eb234775a2c186867a0f884db9fae3566b77f4219ef9fe2c
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs, with at least one pointing to a domain associated with phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to create a network of links on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://vilenefex.ru/strik?utm_term=hl-2270dw+drum+replacement PDF link annotation
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/3095212.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/fjcmjc3/96008228848.pdfIn PDF document text
    • https://xuwogojike.weebly.com/uploads/1/3/1/3/131380868/xijofomelotimoj-xizilezeruz-dawiwivebebemi-wutuzitijaxaz.pdfIn PDF document text
    • https://tojemiwavujiguv.weebly.com/uploads/1/3/4/4/134468879/07781ef01202.pdfIn PDF document text
    • https://cdn.sqhk.co/tidilotofuka/jaxMgjd/bhajan_gana_song.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/cKqhgQC/maze_runner_scorch_trials_book_vs_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/hJjfohf/cheat_game_war_of_empire_conquest.pdfIn PDF document text
    • https://cdn.sqhk.co/kitijorawul/djbHgdG/17447296779.pdfIn PDF document text
    • https://fojomuku.weebly.com/uploads/1/3/4/4/134447263/8a1ba956319789c.pdfIn PDF document text
    • https://nirejabepifu.weebly.com/uploads/1/3/4/2/134266024/dekujulujelumi-semepiditolif.pdfIn PDF document text
    • https://barurusijibipek.weebly.com/uploads/1/3/0/7/130740419/samirusomog.pdfIn PDF document text
    • https://temetufel.weebly.com/uploads/1/3/1/8/131856903/romipame.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/bgLjYia/fernanfloo_geometry_dash_fingerdash.pdfIn PDF document text
    • https://zakutawevuvukug.weebly.com/uploads/1/3/5/9/135970657/zuwoju.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/heshhjj/the_maze_runner_3_movie_download_480p.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/39a9448b-ceb6-4a4d-8770-2cd552d2ce21/44072851633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26fe8b8-5fcf-4ca0-8689-441207165c00/39251580109.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/how_to_remove_bobbin_case_singer_talent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b8b1baf-9243-4dad-9edf-ebe7c1124529/united_states_army_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/python_base64_decode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f39726e7-bf2c-4880-8152-027db2cf5930/4413104626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c26d4c71-05be-47ae-8fa7-ff4ead179436/lg_g_pad_7.0_protective_case.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_off0000e175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE175 5480 bytes
SHA-256: 1296ef93975996e0ff5937e86ffa6369cbbcaeee33c68295a5eb7e4cae1d2eae
font_01_sfnt_off0000f420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF420 11144 bytes
SHA-256: 52ab2cc8f4697e2b15aac9378b4b4905082d939c225bb7613e9815c0ae3c9c47

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