Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bae83a184bacbf6…

MALICIOUS

PDF

74.4 KB Created: 2021-02-18 09:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bcfdea5c77241c9a3baa8404eb4442f7 SHA-1: e511c69ffd53cb25cfa1cdcccd6b3783dd0d52ec SHA-256: 5bae83a184bacbf6dabbfc8067f4e99d26fbc23ee3a9dfba9e5381a9b9c3b48f
134 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one that appears to be a link farm on disposable hosting, suggests a phishing or malware distribution attempt. The heuristic 'SE_INVOICE_LURE' further supports the idea that the document is designed to trick the user into clicking a malicious link.

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.
  • 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://crophysi.ru/123?utm_term=yamaha+ats+1030+specs PDF link annotation
    • http://top-odejda.com/17_biblical_meaning4i7fa.pdfIn PDF document text
    • http://hot-money.fun/last_island_of_survival_mod_apk_latest_versionxfme2.pdfIn PDF document text
    • https://japejezapunat.weebly.com/uploads/1/3/3/9/133999519/naregogidaf.pdfIn PDF document text
    • http://bepebeku.22web.org/88407228425.pdfIn PDF document text
    • http://50offshop.info/datemonegukumeranotony6815.pdfIn PDF document text
    • http://good-production18.site/10_oraciones_con_verbos_irregulares_en_ingles_en_pasado_simpleie2rj.pdfIn PDF document text
    • http://kismyketio.com/debate_flow_sheetblna9.pdfIn PDF document text
    • http://stroymarketmetal.ru/53728970394i1eg.pdfIn PDF document text
    • https://wimegipovuxu.weebly.com/uploads/1/3/4/3/134373819/xutun.pdfIn PDF document text
    • http://carluxepaint.site/dolibevugavasukoze0wdu.pdfIn PDF document text
    • https://tolojosokuriw.weebly.com/uploads/1/3/5/3/135326177/fadixotasa_pomeramatufi_sipotugelex.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/amoeba_sisters_food_web_answerstqyid.pdfIn PDF document text
    • http://fredo.bike/every_witch_way_capitulos_completos_en_espaol_2_temporadakwgi1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mexawidojaxa.rf.gd/55476410995.pdfIn PDF document text
    • http://vikalasur.epizy.com/anaconda_linux_mint.pdfIn PDF document text
    • http://zilapiwet.epizy.com/kobomoxegodolo.pdfIn PDF document text
    • http://difugarulid.epizy.com/jijusapu.pdfIn PDF document text
    • http://povuputuk.epizy.com/answer_machine_iphone.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CA 4888 bytes
SHA-256: 5cbcfd391cbf3cb7656204d7072d8c3fb9dd86a7ce4dc7f253786aa41aebb827
font_01_sfnt_off0000e763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE763 11560 bytes
SHA-256: ff2777055e5cd883ada63a0f9bff1a94df6b27f9fe2615e035ad29b19a17198b
font_02_sfnt_off00010eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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