Malicious PDF — malware analysis report

Static analysis result for SHA-256 540e37bd43c8ccda…

MALICIOUS

PDF

115.2 KB Created: 2021-03-16 12:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04dc3347dc49291d97272806cf26e655 SHA-1: a2c4fc7853fc65b6f9fab54d9d9d984094808e52 SHA-256: 540e37bd43c8ccda55dbb3a38cff2becf6ffca6797a116fb6ed399bdc9bfcd56
126 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. It contains numerous embedded URLs, with a primary focus on 'fokemale.ru', suggesting a phishing or malicious redirection attempt. The PDF structure and embedded links indicate it's likely a spearphishing attachment designed to lead the user to a compromised or malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://fokemale.ru/wix?keyword=cosmetic+ingredient+dictionary+second+ed.+1977 PDF link annotation
    • http://c-advance.space/why_is_my_champion_generator_surgingue5l1.pdfIn PDF document text
    • http://leree6.club/niwuvezodanosetopasofufipr32al.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/a7heAia/wimitibudi.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/jhg0O5u/served_in_spanish_legal.pdfIn PDF document text
    • http://ewwe.space/tudidabubunukimuxapuwalozndis.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/jack_reacher_2016_subtitle_download.pdfIn PDF document text
    • http://xadazobisisim.scienceontheweb.net/zawapus.pdfIn PDF document text
    • http://sudenusona.66ghz.com/76514412385.pdfIn PDF document text
    • http://justiciaforjustice.com/inheritance_christopher_paolini_summarytda64.pdfIn PDF document text
    • http://btsworld.org/ruxikebagedugaq2q3v.pdfIn PDF document text
    • https://cdn.sqhk.co/famazipow/3Iicia5/blocky_farm_racing_game_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lanakupi.epizy.com/sc_hunters_ed_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a43729-71d2-4d87-bcf0-279ccbdb2a81/robejijetuguvom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da48d16e-c3e2-42ca-a565-1e32efa385e3/zutanusizurebarufapip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99db4cec-1f49-4ce0-b68d-6dcab4cbe9ea/my_electrolux_fridge_not_making_ice.pdfIn PDF document text
    • http://beliraguw.onlinewebshop.net/diet_chart_for_weight_loss_for_female_in_bengali_language.pdfIn PDF document text
    • http://gugamofizuxeg.epizy.com/sedidigewufuberolubawab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c26056b-3359-471d-935d-f11ad959c723/9815170381.pdfIn PDF document text
    • http://rajimorix.rf.gd/kiwekiloposumesonapefo.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/54393173854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9edaf6ec-1d55-4729-8486-1b7b061c9dc7/37332636307.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_off000184f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184F8 5552 bytes
SHA-256: 239d043c2868ab75f329f9870857ba016f9eed2e0de30a00db25c6685423d388
font_01_sfnt_off000197d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197D6 11424 bytes
SHA-256: 9b3a948477d4f9513a212b21525e94b261aa5705e5c0d1c794543d5e6be8e784

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