Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9d14fe5ed2b56c…

MALICIOUS

PDF

79.4 KB Created: 2021-04-07 07:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 956e8b3d4b139d35a3c5cc83c62e108c SHA-1: bc125bf7a68466c1fc01c34351b6ec2cd60b9813 SHA-256: ff9d14fe5ed2b56c9f97c0422249d39e68b6a44e66604f9071945e3e6b9dd561
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a phishing page or download further malicious content. The document body, though heavily obfuscated, suggests a lure related to academic papers, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=makalah+biogas+dari+kotoran+sapi+pdf
    • https://sivesasa.weebly.com/uploads/1/3/4/6/134669324/1721125.pdf
    • https://cdn-cms.f-static.net/uploads/4426687/normal_6032cbd1318f2.pdf
    • https://cdn.sqhk.co/roratumopiv/Hzjjjjf/tijugupilekuropila.pdf
    • http://tonedomopoja.scienceontheweb.net/baby_girl_boutique_outfits_cheap.pdf
    • https://cdn.sqhk.co/kupawusel/NXohgjx/war_world_2_movies_2019.pdf
    • http://difozoxezepi.getenjoyment.net/72152796430.pdf
    • https://cdn.sqhk.co/gajerivab/gffghhT/bud_farm_grass_roots_guide.pdf
    • https://sejusidanixaj.weebly.com/uploads/1/3/4/3/134374441/1711853.pdf
    • http://wofurasosezisax.mywebcommunity.org/12529922427.pdf
    • https://cdn-cms.f-static.net/uploads/4449605/normal_60239ce9302b1.pdf
    • https://filofasifujutoz.weebly.com/uploads/1/3/0/8/130874575/nobulidisejiwo-negirikanuzof-zibavileboko-gidutafawepep.pdf
    • https://cdn.sqhk.co/sarunasol/3hchdRy/ranger_vs_zombies_game_planets.pdf
    • https://jovinafunen.weebly.com/uploads/1/3/2/6/132695325/wevulakav_zapuxofo_netulinivez_mazitoj.pdf
    • https://cdn-cms.f-static.net/uploads/4487622/normal_600ce0d53586f.pdf
    • https://jaxemojemilela.weebly.com/uploads/1/3/4/6/134622921/42b9ff0e193f0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d648f74b-05a2-4660-a7a0-76ddec8cc9fa/how_to_teach_main_idea_and_supporting_details_4th_grade.pdf
    • http://nununad.myartsonline.com/mulutivekosomowokapijek.pdf
    • https://s3.amazonaws.com/xulikamul/kumeviriko.pdf
    • https://uploads.strikinglycdn.com/files/536a69bd-82f1-4c84-9094-a342884a8171/vupelajabipurusisi.pdf
    • https://uploads.strikinglycdn.com/files/959f0388-d532-43c1-9228-b33dacb9a193/how_to_run_a_twitter_competition.pdf
    • https://s3.amazonaws.com/wuwabobujasivor/72283704824.pdf
    • https://uploads.strikinglycdn.com/files/aa06e7e4-c6b4-4556-96f4-89f72ccb8ab6/33958285008.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_off0000f845.bin
0bd83e1c01a894816dea956abcecee046e576e1c6b28fcbfe85e7c5d244b03a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF845 5512 bytes
font_01_sfnt_off00010b00.bin
c03db45c6723b8eb35214714efcc2745da9d2c7ccda6ef957175adad062b822b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B00 10344 bytes

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