Malicious PDF — malware analysis report

Static analysis result for SHA-256 305112a6781567a0…

MALICIOUS

PDF

83.2 KB Created: 2021-02-24 19:22:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 402697ad1a0727719abae757b13e7ac2 SHA-1: 8577f396d36fba65af26b6e9967c19709e574363 SHA-256: 305112a6781567a0f19381e6d05f4fcc80c77795ef76cad85ef1aebb70da4f3f
184 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links pointing to suspicious and potentially malicious domains, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier also flagged this file with high confidence. The primary function appears to be directing users to external sites, likely for phishing or to download further malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/strik?utm_term=compliance+with+the+general+data+protection+regulation+%2528gdpr%2529is+whose+responsibility In PDF document text
    • http://pop-marketplace.ru/planet_of_the_apes_1968h5f6w.pdfIn PDF document text
    • https://porukugo.weebly.com/uploads/1/3/1/3/131380087/tikererijefewin-vanuj-monekivurob-satazajij.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/zuparidosoxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410190/normal_6000661523272.pdfIn PDF document text
    • https://fojozotewimoko.weebly.com/uploads/1/3/5/3/135324817/738555.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/radio_thermostat_ct50_battery_replacement.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416143/normal_6034dc757ae55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502246/normal_6025315b80780.pdfIn PDF document text
    • http://titoto.xyz/king_joffrey_game_of_thrones_actortl8tl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423136/normal_600e07cbd2a7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419412/normal_5fdddf4e9268a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421939/normal_601b5640a6532.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/5564971060.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/34607008838p0dwp.pdfIn PDF document text
    • https://febavezexiwajo.weebly.com/uploads/1/3/4/7/134703432/f35d4ee509e4c.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/zimubud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372101/normal_5fc57f142ca69.pdfIn PDF document text
    • https://zedowami.weebly.com/uploads/1/3/1/6/131637063/cb66fc1aa9.pdfIn PDF document text
    • http://busivel.xyz/87481353769lvj5n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zepizevut.atwebpages.com/pebexesurikoziwawema.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_off00010681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10681 5880 bytes
SHA-256: 4092b9d9661604fdba3d428db0c247fe411dc9b02fb20f2d4b062ba49d44ccc1
font_01_sfnt_off00011a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A70 10452 bytes
SHA-256: 67dc00206996cc74eaf988efb832b09e27a8cccd6ee89e9d26bc5568ae78efaf

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