Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7e302060c30953…

MALICIOUS

PDF

69.6 KB Created: 2021-03-18 21:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34215c1a5bd923ed15f70a8ff2fd8b90 SHA-1: 14a1dcff34071e692b346e2372ad2a980ba151ca SHA-256: 8e7e302060c309537120e780026645452f7f37bb141567d8d4f96e0c753ef6ff
134 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, many of which point to disposable domains and are likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to a 'motorcycle manual pdf'. The presence of external URIs and the link farm heuristic further support a phishing or download attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=motorcycle+manual+pdf
    • http://de-bewertung-id-q2e5t23.top/14078649398nvzc3.pdf
    • http://zukixulen.mypressonline.com/4839537458.pdf
    • https://cdn.sqhk.co/luwesefizi/bbtjje8/fonemukogex.pdf
    • http://dizofuses.mypressonline.com/act_practice_test_free.pdf
    • http://topsale.pro/888762034562kg4o.pdf
    • http://christinaanddavid2019.com/bhula_diya_song_320kbpsyvfio.pdf
    • https://cdn.sqhk.co/fokigegoma/LMjbicM/fanufefe.pdf
    • http://grandov.pro/25003364081wpawb.pdf
    • http://dontbeshy.xyz/werotivesejerikcr1hv.pdf
    • http://copyrightnotices-form.com/livros_de_anselm_grun_emwrr27.pdf
    • http://riwuvodobopexu.mywebcommunity.org/tata_sky_hd_channel_number_list_2020.pdf
    • http://moneymaya.site/kawesnsmfi.pdf
    • http://ruwazumusef.scienceontheweb.net/jotul_602_v2_for_sale.pdf
    • http://tadurarawi.mypressonline.com/pubaj.pdf
    • http://womuvizitina.mywebcommunity.org/sap_bpc_user_guide.pdf
    • http://lightly.store/mold_design_in_solidworkstn39z.pdf
    • http://mapotilij.mygamesonline.org/51443793546.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/43e1e143-a8d1-4e56-b86e-e53d7109cfde/cursive_writing_sheets_blank.pdf
    • https://uploads.strikinglycdn.com/files/883548ce-d57e-4a02-8f8e-4e1254d96f15/how_do_you_pray_the_peace_rosary.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_off0000d327.bin
276435ea4c90238b2190e58590d617f557f81c4721bd3663f7f4e23f078b22a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD327 5228 bytes
font_01_sfnt_off0000e4f0.bin
096b2729b313a4d92a4d58ac9a33920b7ef52d30eb84866de134205337a06af9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F0 10720 bytes

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