Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2fb8ebc6424bc6…

MALICIOUS

PDF

70.1 KB Created: 2021-03-04 04:06:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 59a4a15b3732f33f8e6357f7959d7160 SHA-1: 015a69bdab9ebc6bd4a87fe9be16d185f83ca26c SHA-256: 5e2fb8ebc6424bc6b887a45e42a552f07a5786ebaa6ea40d8897d964f2c6c107
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'types of conflict in the veldt', likely a pretext to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=types+of+conflict+in+the+veldt In PDF document text
    • https://cdn.sqhk.co/vefusujix/MgdifGU/magic_dragon_village_cheat_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369632/normal_5fc7e36ae9b37.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/eoelheB/descargar_fall_race_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/hjtoXLL/puxapadin.pdfIn PDF document text
    • https://cdn.sqhk.co/rotuzuwibi/hhN6ghu/diamond_coordinates_minecraft_pe.pdfIn PDF document text
    • http://bodyita.space/lukasovijedasazuniruweyuoqn.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/axNghhc/titan_quest_ragnarok_quests_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_601b516ea32e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450259/normal_602f3f61b4e46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_600c846e60737.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sajezife/rovutosemizejumanifim.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/28493642687.pdfIn PDF document text
    • http://wojudor.epizy.com/readers_digest_complete_guide_to_sewing_abebooks.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/41429501247.pdfIn PDF document text
    • http://mutatafolusak.epizy.com/graphic_design_online_free_software.pdfIn PDF document text
    • http://xesufiwonelu.epizy.com/kijunid.pdfIn PDF document text
    • http://xozujojunesu.epizy.com/accounting_theory_and_practice_notes.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_off0000d6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A8 5048 bytes
SHA-256: 142a5273ab2c97be12e3e0f15f7fb57f79faabb3fc15a0792776ab41301c6405
font_01_sfnt_off0000e7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7ED 10436 bytes
SHA-256: e9d1e67f18f521b49f3acebaefe190b0a29dd195fc681b61b9f3bba0c082baaa

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