Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b09bfb2a75eeff…

MALICIOUS

PDF

77.2 KB Created: 2021-03-03 03:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4f5a527a279c988098dca4241bf7e3eb SHA-1: 263a4e346ffb1abe32304a60a8b3fee3c8d8b9f4 SHA-256: f7b09bfb2a75eeff061ebc6273faef3c4ae61b3d7759442c9e30c1a47a5762f4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to PDF files hosted on `cdn.sqhk.co`, suggesting a link farm or SEO poisoning tactic. The primary URL `https://druttle.ru/strik?utm_term=how+to+do+welding+inspection` appears to be a lure to draw users into a network of malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/strik?utm_term=how+to+do+welding+inspection PDF link annotation
    • https://cdn.sqhk.co/bomumuxa/idjebsc/73470457611.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/gdjfjdw/79955759012.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/W3gUPKf/87403001650.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/jbgeSjh/bomb_calorimeter_manufacturer_in_mumbai.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/ghVjfid/bus_simulator_ultimate_unlock_routes.pdfIn PDF document text
    • https://cdn.sqhk.co/telupiza/Llibjhl/42596640013.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/jdgdCha/swing_shift_movie_plot.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/hhY5gii/jiwidupewomap.pdfIn PDF document text
    • https://cdn.sqhk.co/turogepufe/iaJ5Cje/ziraditudoligufele.pdfIn PDF document text
    • http://sesalon.xyz/witirozofajofadaasbe.pdfIn PDF document text
    • https://cdn.sqhk.co/belumozobu/vIFoXif/21532650521.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/heLHjd8/pejumaz.pdfIn PDF document text
    • https://cdn.sqhk.co/xonizarisu/hic4jca/commuters_sans_github.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/jhe5hjc/samsung_level_active_wireless_bluetooth_fitness_earbuds.pdfIn PDF document text
    • https://besixovit.weebly.com/uploads/1/3/5/9/135997460/c334e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/types_of_technical_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/54964374974.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/tulubifejufi.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/mojerosabuxux.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_off0000f30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30D 4988 bytes
SHA-256: 01667893caa65b799b4f7da209d1a154000ae5be4214e6ac3a09faf21922d4bd
font_01_sfnt_off00010433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10433 10536 bytes
SHA-256: 4df73054a67d31dbb21fd98543bb8bb795616c2c8b1ead8f5859a1864bc51f94

Open this report in the interactive analyzer, or submit your own file for analysis.