Malicious PDF — malware analysis report

Static analysis result for SHA-256 7519f60f89972608…

MALICIOUS

PDF

77.4 KB Created: 2021-03-23 01:36:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e44a6442fbd7d00de645f06ca4718bd SHA-1: 7209d78ca58a931291597a1b9de631256ca9f410 SHA-256: 7519f60f89972608f714330116af282be6aebee5c47f49e3eaf65246ebff3652
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic point towards the document's primary function being to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=idaho+food+safety+exam+study+guide+pdf
    • https://mawobomogagot.weebly.com/uploads/1/3/4/1/134109187/3481780.pdf
    • https://pifavakibapel.weebly.com/uploads/1/3/0/8/130814246/79d213e.pdf
    • https://cdn.sqhk.co/lituxopevuk/bthgvje/fishing_clash_tips_ios.pdf
    • https://fovinerorowabas.weebly.com/uploads/1/3/2/6/132682717/fee211464.pdf
    • http://sopafekidis.sportsontheweb.net/pebotorutesuzebotiteliruw.pdf
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/d397083c12.pdf
    • https://dopakuxapat.weebly.com/uploads/1/3/4/8/134895633/bitulivike.pdf
    • https://xufiridib.weebly.com/uploads/1/3/5/3/135346556/3780010.pdf
    • https://cdn.sqhk.co/jegisizozul/OmiiLjf/xiwutivudigu.pdf
    • http://jisutuxoxaza.medianewsonline.com/doretizolefunuturoribaka.pdf
    • https://redorofi.weebly.com/uploads/1/3/5/3/135383823/xoxasin.pdf
    • https://vinadesafabav.weebly.com/uploads/1/3/5/3/135305522/fegufuxowew.pdf
    • https://cdn.sqhk.co/wolebiduju/jaijaaR/7630049353.pdf
    • http://fafesixokegigi.getenjoyment.net/s._t._a._b._l._e._program.pdf
    • https://tilawifi.weebly.com/uploads/1/3/4/4/134480999/9851551.pdf
    • https://mipabewezodif.weebly.com/uploads/1/3/5/3/135315693/250656b13c1bc.pdf
    • https://cdn.sqhk.co/pumafuki/0icwggq/bepusisow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/451aa1b8-192f-4668-b30a-1dd20eb7010b/does_samuel_beckett_bridge_open.pdf
    • http://kivozusemu.atwebpages.com/pojafonadupukimo.pdf
    • https://uploads.strikinglycdn.com/files/8e898e7f-0249-4a6b-a79b-f2d7ee7b7ff9/its_kind_of_a_funny_story_trailer.pdf
    • http://sokekakeloji.onlinewebshop.net/how_do_you_reset_the_filter_on_a_honeywell_thermostat.pdf
    • https://uploads.strikinglycdn.com/files/4f3e8528-35bc-454f-9abe-9c2a593a8918/57216171759.pdf
    • http://pugamob.rf.gd/kirake.pdf
    • https://uploads.strikinglycdn.com/files/4452f262-712a-41de-8851-1943d616483b/answers_adams_calculus_9th_edition.pdf
    • https://uploads.strikinglycdn.com/files/14ee5ae9-f426-4a1a-adf7-00446600317a/domain_and_range_of_inverse_functions_worksheet_with_answers.pdf
    • http://puwekaxaxowiza.epizy.com/upenn_logo_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f171.bin
8bc6a040d9b574b302f7d6d6a0384056a52b377bca43ff74ee1708e062c980fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF171 5436 bytes
font_01_sfnt_off000103e0.bin
952b40e6ab2527b8c2274606ddf5b1e32eb19811f73c64ed6bc7fd0f69b0fc5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E0 10448 bytes

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