Malicious PDF — malware analysis report

Static analysis result for SHA-256 20dcf95cd27ba4fe…

MALICIOUS

PDF

65.1 KB Created: 2021-04-15 09:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ee7e1b0a9056a6a0bc9745607e1da5fa SHA-1: 55debd109b832630c64debabde0bea9ca596d2c1 SHA-256: 20dcf95cd27ba4fe9c8f7378c92e4ee4d54e8598f071d009bfacadaf2ffc2eca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://botokaw.ru/strik?utm_term=should+i+read+the+thrawn+trilogy PDF link annotation
    • http://rte-ita.fun/foxbet_super_6_winnersy5bk5.pdfIn PDF document text
    • http://kreativoblako.com/facebook_blueprint_coursenwiyf.pdfIn PDF document text
    • http://tdsevsvet.ru/how_much_does_a_2020_porsche_macan_costoe16y.pdfIn PDF document text
    • http://memimusisat.getenjoyment.net/catholic_study_bible_3rd_edition.pdfIn PDF document text
    • http://lonotel.mygamesonline.org/8213789047.pdfIn PDF document text
    • http://my-favshopc.online/13919163306p55wt.pdfIn PDF document text
    • http://remastacer.com/mokedomupusevat145vc.pdfIn PDF document text
    • http://loveantravel.xyz/bbg_workout_meaning5dqhb.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/pipaneku/us_guided_adductor_canal_nerve_block.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18eac219-dc8f-4a52-899e-5abe5fca2704/74829174631.pdfIn PDF document text
    • https://78f121e6-5824-477f-9480-4bf23eba804c.filesusr.com/ugd/9564ad_3401685612b14f4cb76889cd89eff5d6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c430eff-bf67-4c73-9a42-af08dd616426/snow_whitening_teeth_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/55640132774.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/domexujifaletijubi.pdfIn PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_a7ad23cb97524bb3ba8bd184ed742c8a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b90b9fb7-afac-461a-a98b-c622593a4af1/59680517330.pdfIn PDF document text
    • https://ac614e2c-2e00-43e4-a80f-2c6bce9fb64b.filesusr.com/ugd/f103bb_cb866a3dbbaa455997ccb0aa11748960.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf3b29c-cd65-4e59-a105-ec379d6fa364/troy-bilt_tb30_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd21fd2-f168-463a-89f8-d027cb4e8b9d/what_are_the_mandalorians_in_star_wars.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_off0000c483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC483 5208 bytes
SHA-256: 22ccb313dd8a3cca2248344c9ee28a04672e82b1c0c4f42efa6e9b4fc65cfdb2
font_01_sfnt_off0000d645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD645 9468 bytes
SHA-256: cd58513452abe74aee5c6a79510fb6ad31d73637ff7f562ddb5257d01eeb7513

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