Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b47cb2fd8e0c03d…

MALICIOUS

PDF

78.6 KB Created: 2021-02-15 21:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 92a594cbb4d68b06732449d895a0949d SHA-1: 3095f35e227fc80185e6fd36ddf494bb7d8274e1 SHA-256: 3b47cb2fd8e0c03d48129642ef8560e156feeb33dd94dce6ca9c6b2e7432730c
134 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The presence of numerous external URIs, combined with the 'Fake invoice / payment lure' heuristic, strongly suggests a phishing or malware distribution attempt. Although no scripts were extracted, the document's structure and embedded links point towards an attempt to trick the user into navigating to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://bologen.ru/wix?keyword=how+to+apply+credit+memo+to+outstanding+invoice+in+quickbooks PDF link annotation
    • https://cdn.sqhk.co/demanajinu/ieghge0/waxerifazinepomu.pdfIn PDF document text
    • http://markettop.pro/amoeba_sisters_cell_transport_answersu7k3j.pdfIn PDF document text
    • http://like-store.site/muvunawufolamuniqvgs0.pdfIn PDF document text
    • http://goromeo.club/guidelines_for_drinking-_water_quality_volume_1f0osj.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/kufamisebaf1s3p1.pdfIn PDF document text
    • http://nakanilo.club/secret_language_of_birthdaystenos.pdfIn PDF document text
    • http://begdas.fun/divimo0nifz.pdfIn PDF document text
    • http://vbruti.site/lingua_latina_answers4aexk.pdfIn PDF document text
    • http://idealica-itufficiale.website/mekokebexoxx9r8.pdfIn PDF document text
    • http://qqkaxes.xyz/99956455957lhdkt.pdfIn PDF document text
    • https://bivufinemena.weebly.com/uploads/1/3/1/3/131380184/da9076e56c9a6.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/ghEVb6n/63611937285.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/eBjeJhd/transformers_shattered_glass_fanfiction_starscream.pdfIn PDF document text
    • http://vinnipoh.space/793320756000hjud.pdfIn PDF document text
    • https://vowabogebem.weebly.com/uploads/1/3/0/7/130775978/8246367.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/eXAUFSg/44623284246.pdfIn PDF document text
    • https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/3575269.pdfIn PDF document text
    • http://cancandance.org/triangle_angle_bisectors_worksheet0ho8p.pdfIn PDF document text
    • https://lawukexudemodu.weebly.com/uploads/1/3/4/0/134041757/a694bf8c727099a.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/ijjc24b/88023125346.pdfIn PDF document text
    • https://cdn.sqhk.co/tegiriwepaj/ibg5jgK/jutaxapegezefofozepisi.pdfIn PDF document text
    • http://qrettalq.online/observe_and_report_anna_faris_song0q99r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 5936 bytes
SHA-256: dc4ab6133d4c5c5df563c53a91d8e3a8ae4aeb356a585fb74fd11b8bdaa11667
font_01_sfnt_off00010894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10894 10532 bytes
SHA-256: 14b39730395cca0f2bbf78812e9f128addc785f04393d74a918ab6ea94c28524

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