Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ae3c4b3a71a2ab…

MALICIOUS

PDF

171.7 KB Created: 2021-03-23 21:53:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: fbd94cee8eee3d57692b00a2143ec996 SHA-1: 986732ac054566b0eda2e756010cd43206b4cf31 SHA-256: 58ae3c4b3a71a2ab1c7448bf44cb75387a8644f03c43a7150420acad6eb33e00
134 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous external URIs, many hosted on disposable domains and part of a link farm, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the 'download button' heuristic further support the conclusion that the document is designed to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/award?keyword=allyn+and+bacon+guide+to+writing+fiu+6th+edition+pdf PDF link annotation
    • https://metojonokodoto.weebly.com/uploads/1/3/4/8/134881876/5170582.pdfIn PDF document text
    • http://danoguvu.medianewsonline.com/muzatole.pdfIn PDF document text
    • https://banatili.weebly.com/uploads/1/3/5/3/135314160/8171956029.pdfIn PDF document text
    • https://nonafinawajag.weebly.com/uploads/1/3/4/3/134331790/xuviwubaw-galujinaxufaber-sepos.pdfIn PDF document text
    • http://kozijadeji.22web.org/bitcoin_mining_investment.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/begutasatolizonotuv.pdfIn PDF document text
    • http://bizifemodefi.mygamesonline.org/romancing_the_bookworm.pdfIn PDF document text
    • http://sojurufo.iblogger.org/werewolf_the_apocalypse_20th_anniversary_edition.pdfIn PDF document text
    • https://dapalaboz.weebly.com/uploads/1/3/0/8/130874192/9595614.pdfIn PDF document text
    • http://punejew.mygamesonline.org/matrox_monarch_hdx_reset.pdfIn PDF document text
    • https://garovinarabibaf.weebly.com/uploads/1/3/5/2/135293384/7434139.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/3d0f8dc9-2375-42f4-b2dd-102269532fed/fodosudogelowuzi.pdfIn PDF document text
    • http://xunevonobi.epizy.com/libro_fisica_serway_tomo_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da00f27-fba1-4941-84be-ef016609dd23/how_to_do_a_round_loom_set.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/59145759721.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/how_much_calories_does_chick_fil_a_fries_have.pdfIn PDF document text
    • http://vuruwabudakase.epizy.com/stone_tiles_roofing_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d0d68c-006a-4ccc-ad62-2801eb163d34/ziloputoduledigiworuxi.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_off000264be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x264BE 5716 bytes
SHA-256: 70359eb5f91a4eaf5fc8546184dcb7594f0b6ef82b5f545689111fca5218be65
font_01_sfnt_off0002784b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2784B 11988 bytes
SHA-256: 97c9bb16c7d3a6da502c0392aef3dc28196b698d5b15c59b83ea9806002e9dbb

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