Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae65e34181948f96…

MALICIOUS

PDF

68.3 KB Created: 2021-02-14 18:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2cbff30e5135caf3eeb173f1795f58af SHA-1: 8505a4d75f1296d75c3f2ec4cfe0195e164431e3 SHA-256: ae65e34181948f96c10e8f89959c62d02b0ea59eaa731ab5f3a22626027da32a
134 Risk Score

Malware Insights

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

The PDF is flagged as malicious by ML classifiers and ClamAV, and exhibits characteristics of a link farm on disposable hosting. The document body, though heavily obfuscated, suggests a lure related to a financial calculator manual. The presence of numerous external URLs, many on disposable domains, indicates an attempt to redirect the user to malicious content, likely a phishing page or further malware download.

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://jottigo.ru/123?utm_term=ba+ii+plus+financial+calculator+manual PDF link annotation
    • https://somokowu.weebly.com/uploads/1/3/1/3/131383604/kofoxamafunefapulok.pdfIn PDF document text
    • http://rupekudufim.22web.org/kinajafakidalepiso.pdfIn PDF document text
    • http://vemasujananexu.22web.org/ati_chlorine_analyzer_manual.pdfIn PDF document text
    • https://sozazajigosana.weebly.com/uploads/1/3/0/7/130739782/76354.pdfIn PDF document text
    • http://nupubidodeje.22web.org/visidunuwagu.pdfIn PDF document text
    • https://wupizesave.weebly.com/uploads/1/3/4/5/134581048/jixejonet_donopoke_tibub.pdfIn PDF document text
    • https://banatili.weebly.com/uploads/1/3/5/3/135314160/cdb7f49490.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dodujorumapide.epizy.com/ib_application_essay_format.pdfIn PDF document text
    • http://valapapiwusujeg.rf.gd/96498699731.pdfIn PDF document text
    • http://godavuvexo.epizy.com/39982512746.pdfIn PDF document text
    • http://dafawesag.epizy.com/filmywap_new_movie_2019.pdfIn PDF document text
    • http://votitagupen.epizy.com/aasimar_d_d_3._5_manuale.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/simple_answer_of_tell_me_about_yourself.pdfIn PDF document text
    • http://bekepijamewevo.epizy.com/anil_kapoor_judaai_movie.pdfIn PDF document text
    • http://javisan.epizy.com/seenaa_qubee_afaan_oromoo.pdfIn PDF document text
    • http://molugafew.epizy.com/27662199401.pdfIn PDF document text
    • http://galikamot.epizy.com/wipiriruvinubopeve.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_off0000cd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD69 5212 bytes
SHA-256: 6adc204401df222299b25bf7d57113066e0c103efe34b64fe737a686df2ef6b2
font_01_sfnt_off0000df10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF10 10832 bytes
SHA-256: 898824ee391e2003d294126bff7ffe8637f9c4b30169bfc1d680b9a6d25a51a9

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