Malicious PDF — malware analysis report

Static analysis result for SHA-256 15744b4b6de8b0a0…

MALICIOUS

PDF

68.8 KB Created: 2020-12-17 04:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7ebbb6b855d2b449175439ca5659e5a2 SHA-1: 22cf936b40814a3f4975963ad7a2b3e27424b41b SHA-256: 15744b4b6de8b0a0dc1c6fd1a1562e0671ab4418e53253cbd1619329caf61cce
126 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=cystic+fibrosis+and+protein+synthesis+case+study+answers PDF link annotation
    • https://ginuwedisifixel.weebly.com/uploads/1/3/4/7/134744372/9348927.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/tabutekes_mekiwodeguliva_dasatakikenit_vedatebodameju.pdfIn PDF document text
    • https://keregejuvuja.weebly.com/uploads/1/3/4/3/134345288/sisidobiw-bolevami.pdfIn PDF document text
    • https://fasuwilobavofe.weebly.com/uploads/1/3/4/4/134489762/c5203595579d1c.pdfIn PDF document text
    • https://rogenogenitel.weebly.com/uploads/1/3/4/3/134316557/lupiri.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/xukijixegozemixolata.pdfIn PDF document text
    • https://wobafedufuj.weebly.com/uploads/1/3/4/0/134012960/1100445.pdfIn PDF document text
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/napurisu-pilaxak-xakoba-xazavulebew.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/rodigapigeta/chain_rule_with_tables_khan_academy.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/5338289182.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc188b1c89e1c4b8fc2eaf8/t/5fcd7be7fe657040d5a84273/1607302120332/wildlife_rescue_near_me_birds.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e5b8a3bf4b14aba92f9c/t/5fc1a956e18c5c478e3a144d/1606527321164/an_edible_history_of_humanity_quizlet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc597a0f9866f3fd2f3d113/t/5fd74cc8154d72787108d21c/1607945419109/imei_tracker_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/stick_war_hacked_all_units_unlocked.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/27402966542.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_off0000d1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B3 5452 bytes
SHA-256: 819354d59ca1f88b02d0207f8e5f213b7764c93938b71f1cd960818155e76904
font_01_sfnt_off0000e447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE447 9652 bytes
SHA-256: 93e45841c833252970879da1e43e093e8fe47db4fd8b75b4dbc680bd616d0341

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