Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cddf7fe93251543…

MALICIOUS

PDF

68.7 KB Created: 2021-03-19 17:02:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3138cf5fd85522d2996e149ebc7caa16 SHA-1: bd876e3793c570116ffd10900f28c5f704441da0 SHA-256: 3cddf7fe93251543bdaf7331fffa7d43d702f0c71748e80f7475491f3bd46e02
134 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The presence of a 'download' button lure further supports a malicious intent to trick users into downloading further payloads or visiting phishing sites.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=holt+geometry+lesson+10.5+practice+b+answers PDF link annotation
    • https://bitugibetofovo.weebly.com/uploads/1/3/0/9/130969362/wamufubinepawe_pefumopodogimon.pdfIn PDF document text
    • http://mavpa.fun/594628597546afql.pdfIn PDF document text
    • http://pasoxegidameso.iblogger.org/vakugiforupojawobunidako.pdfIn PDF document text
    • http://kind-insta.site/how_much_to_maintain_a_cessna_172ng7ez.pdfIn PDF document text
    • https://dukazisilibe.weebly.com/uploads/1/3/4/6/134679988/mufutaxok_feludidemesosu.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/60615136730.pdfIn PDF document text
    • https://dodirubiv.weebly.com/uploads/1/3/4/5/134505429/texidimavikisig.pdfIn PDF document text
    • http://romeita.space/how_to_open_ipega_controllercldvi.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/faseja.pdfIn PDF document text
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/1452403.pdfIn PDF document text
    • http://ferafukapawap.scienceontheweb.net/bedefijavasafokanikitov.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/nokiwotaq72fr.pdfIn PDF document text
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/4461904.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sokekakeloji.onlinewebshop.net/47069923447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e3347e-ffc3-4696-8436-3c4471a0863f/biology_chapter_13_review_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b88231-9635-4970-81b9-033fedbcd942/8956256025.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/how_to_replace_battery_on_ipod_classic_30gb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/892be094-ad13-49c4-bd1a-66ea2ad35be2/26151023173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1da0d61-90d3-4574-8a05-e55905d44da7/50202612519.pdfIn PDF document text
    • http://kojomazudogog.epizy.com/odisha_postal_mts_answer_key_2020.pdfIn PDF document text
    • http://ligekasuxube.onlinewebshop.net/40371002797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67aa1e51-a2f0-47b6-8b48-5e31d4b25c36/wazotemufozetisamobuk.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_off0000cd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1B 5896 bytes
SHA-256: ded95750632d0da2bf7dd2b05ac8b25ff661a6761c18987e6fe6951cc58b859d
font_01_sfnt_off0000e13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13B 9992 bytes
SHA-256: 47907cc8f3c52b00f0c76270d0526d8c789308388d12570776eae74f5d5a674f

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