Malicious PDF — malware analysis report

Static analysis result for SHA-256 03273a0519b02145…

MALICIOUS

PDF

79.6 KB Created: 2021-03-26 08:50:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 344322ec216881dc3a2f68c2159147cb SHA-1: 5548c8d551847b3671fcc9e61fd6aec8ec0d34d6 SHA-256: 03273a0519b02145eb6b4299cc8eb80f5b845e71af752c782c876055e8647252
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The embedded URLs suggest an attempt to redirect users to potentially harmful sites, possibly for credential harvesting or further payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=examen+de+historia+de+mexico+secundaria+pdf
    • http://ruwexonofedu.iblogger.org/beholder_full_apk.pdf
    • https://wenojuzak.weebly.com/uploads/1/3/4/2/134265903/65091298508a.pdf
    • https://koludoselutak.weebly.com/uploads/1/3/4/8/134893798/5649248.pdf
    • https://faxosuxen.weebly.com/uploads/1/3/4/3/134342902/a5b6691a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/lizuseguwix/skype_7._36._150.pdf
    • https://uploads.strikinglycdn.com/files/73fa2f63-89a4-486f-a289-5383f125d9cb/58681001381.pdf
    • https://uploads.strikinglycdn.com/files/310f6f44-c071-4839-beb3-4fd921639a13/fifty_shades_of_grey_2_songs_list.pdf
    • https://uploads.strikinglycdn.com/files/bd3387ad-fc15-46b5-9982-9a392de59a46/disebesegusi.pdf
    • https://s3.amazonaws.com/jumedemimo/latest_chrome_apk_for_android_tv.pdf
    • http://gelaleted.rf.gd/14663337236.pdf
    • https://s3.amazonaws.com/gagagakigibapo/nobosapagu.pdf
    • https://uploads.strikinglycdn.com/files/aaf85ce2-55d1-4c7f-b074-b7ce753b8ecd/5_love_languages_by_gary_chapman_free.pdf
    • https://s3.amazonaws.com/rakabexozu/cameo_sundance_spa_owners_manual.pdf
    • http://zisibife.epizy.com/what_is_selective_coding_in_grounded_theory.pdf
    • https://s3.amazonaws.com/fexuror/mission_mangal_full_hd_movie_bluray.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac5.bin
49b25a6a35b3970454efe495507f60c552468a6d442a005b89e1a36f05bbe1f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC5 5268 bytes
font_01_sfnt_off0000fc82.bin
26ecee7d5d97cf1a1464e8edc71fb9d873232e8fd9c9d788a1f84bebc2d84e11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC82 11404 bytes
font_02_sfnt_off0001215e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1215E 4324 bytes

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