Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ea4689a1c64f66…

MALICIOUS

PDF

78.3 KB Created: 2021-03-25 00:30:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02d3f749eeca184a09cd470d7c1da0d0 SHA-1: b3577a634500b398783c74b6918cc551efb39d03 SHA-256: 61ea4689a1c64f66223d4a2783717184211051446e0bca2327dbb79949ba5841
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, appears to contain keywords related to sales, likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/wix?keyword=bandolier+bag+for+sale PDF link annotation
    • http://goldstein.berlin/kozuvovisixakuvupg3q9.pdfIn PDF document text
    • http://vengriya.space/sunpro_mini_tach_wiring_diagram52nsy.pdfIn PDF document text
    • http://talebakela.iblogger.org/83525382570.pdfIn PDF document text
    • http://milanbeach.fun/marginal_costing_formatzrwcg.pdfIn PDF document text
    • http://pibakulisup.medianewsonline.com/an_inspector_calls_booklet.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/hchjZzd/ladavokebekufapuvaj.pdfIn PDF document text
    • http://bigchance.pw/steamer_for_clothes_costco8jgow.pdfIn PDF document text
    • http://fitdieta.com/woxaxudezm27l.pdfIn PDF document text
    • http://tadidavazutopa.sportsontheweb.net/jiwepuwenizewilu.pdfIn PDF document text
    • http://bugilinupapud.mygamesonline.org/48599052188.pdfIn PDF document text
    • http://xitnet.fun/bobedokufukelezibjl61n.pdfIn PDF document text
    • http://viwavidif.getenjoyment.net/tupibubobokarupogarebal.pdfIn PDF document text
    • http://cozyplacefor.rest/jijikuwumugetusor5t82p.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/heUijd6/lol_zed_combo_guide.pdfIn PDF document text
    • http://glasshookahcatering.com/423510907268r3e5.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/AiguAhj/warframe_helminth_abilities.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/pMEjdha/letutafujonirutopibow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c35c1a01-7a6b-48c7-b5b5-ad75820f589e/79639476935.pdfIn PDF document text
    • http://fadifisevak.epizy.com/used_stihl_ms_170_chainsaw_for_sale.pdfIn PDF document text
    • http://kokefuvikedile.rf.gd/bugurobetodabipaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c20f4c9-3a1f-4840-bf14-0370d64d3a52/simmons_sd5k_power_supply.pdfIn PDF document text
    • http://redexini.epizy.com/99356856918.pdfIn PDF document text
    • http://xorikija.epizy.com/24877268136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86d56398-541c-49c0-b8d2-c8a351404a3d/natozobubodake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72fb2503-956e-4fb1-b338-eabb550704f7/xowuxatigedogoruxi.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_off0000f3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B9 5264 bytes
SHA-256: 475654035ae48c053e058963236c47c65516ffd4823af6c71f2696e4dd373630
font_01_sfnt_off000105b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 11148 bytes
SHA-256: b953114932ba1a05408247dded980964b94c9a92734f07c88433c2666e440504

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