Malicious PDF — malware analysis report

Static analysis result for SHA-256 76facac05e1edb84…

MALICIOUS

PDF

77.9 KB Created: 2021-05-06 06:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ba91b5172badab8dcd417accebdcd712 SHA-1: cf673055972e9d0b1a7119a063f3a3310e3cab3b SHA-256: 76facac05e1edb84121fadf7f0d07b54f164b6802901c834fea63ddc143527d1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of embedded external links, characteristic of a link farm designed to direct users to phishing or malicious websites. The presence of external URIs and the PDF_SEO_LINK_FARM heuristic strongly suggest a phishing or content-scraping attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=the+environment+and+you+norm+christensen+pdf PDF link annotation
    • https://jupisururixed.weebly.com/uploads/1/3/4/3/134339091/nabore.pdfIn PDF document text
    • http://mikrotikwizard.com/dukodimazironifog8xlyw.pdfIn PDF document text
    • http://dayzcommunity.info/words_their_way_elementary_spelling_inventory_sentenceskj75i.pdfIn PDF document text
    • http://tersq.space/79854277524cdryc.pdfIn PDF document text
    • http://rerupebe.iblogger.org/cabarceno_mapa.pdfIn PDF document text
    • http://creditscoretracking.info/can_you_use_keyboard_and_mouse_on_ps4_rainbow_sixu8adh.pdfIn PDF document text
    • https://ronunute.weebly.com/uploads/1/3/1/0/131070227/9949733.pdfIn PDF document text
    • https://kazimiposaduvab.weebly.com/uploads/1/3/1/1/131163956/1140433.pdfIn PDF document text
    • http://zaruxejubo.iblogger.org/football_players_hd_images.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sededuvox.rf.gd/16723088741.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/xapifojel.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/wosuzenidolaxewevetotag.pdfIn PDF document text
    • http://vomogowejupilu.rf.gd/gerijazozalifujitolis.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_c918344a96984bfb8a40e65315b16dcc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/ninij.pdfIn PDF document text
    • http://fevufanitefega.epizy.com/adobe_video_editor_for_android.pdfIn PDF document text
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_624e07bb7e5e45ec930c1f80771899fc.pdf?index=trueIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_1f473ef9b6b14f098a283681cf22b49e.pdf?index=trueIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_43e4449c051541c084faedeb49b433da.pdf?index=trueIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_de6240821484484a8449a9a351f7e5f9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/nabesevubikup.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_off0000ef6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6F 5472 bytes
SHA-256: f55cfebba9d11570d1a409a760293e90d8155412348879685a58fee65e01e4ae
font_01_sfnt_off000101ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101ED 11940 bytes
SHA-256: 64de39626fbd17b7547c87df037705ba497c3546e944ea6250b05c27b6c50c72

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