Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8df429f891828fa…

MALICIOUS

PDF

106.3 KB Created: 2021-05-17 06:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b2c217ff487a396764dc6a54d0ca639a SHA-1: 927840bda96b8ec3dff8206466af20ac84dfb51c SHA-256: d8df429f891828fab2efbfa1c43274a3526d70141b50a2ffd64b0921eff89690
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 0.9990

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://lozipotod.ru/strik?utm_term=kya+love+story+hai+movie+song+download+pagalworld PDF link annotation
    • http://profaudit32.ru/jipamamapofojlidg4.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/wugatebuxi.pdfIn PDF document text
    • http://choosemadam.site/bedidejopamoja66qe.pdfIn PDF document text
    • http://yewes.fun/16684206874y1vuw.pdfIn PDF document text
    • http://usacreditmonitoring.info/26367418387j8jti.pdfIn PDF document text
    • http://gatorama.site/gunusuvarima4mwlu.pdfIn PDF document text
    • http://copytoshka.ru/war_of_the_worlds_season_2_episode_1_sbssuyo6.pdfIn PDF document text
    • https://fazerirusabutef.weebly.com/uploads/1/3/1/3/131381144/72b160811a4.pdfIn PDF document text
    • http://byt-upak.ru/92093709715s5g76.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/sajaxujuvevolika2yb6.pdfIn PDF document text
    • https://cdn.sqhk.co/xelimibela/dicKHjg/tux_racer_macos.pdfIn PDF document text
    • http://7evenrp.ru/dibomidowagodojimjc1nc.pdfIn PDF document text
    • http://sayfelengs.space/lugiferaxirop01sv.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/O58gckh/best_tamil_keyboard_for_android_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/hjgfD9k/nbc_sports_network_premier_league_commentators.pdfIn PDF document text
    • http://cookwellbakewell.com/fekuvepabugajaderufizurerai1ib.pdfIn PDF document text
    • https://fetevosave.weebly.com/uploads/1/3/1/4/131438058/xijedusifajowenitom.pdfIn PDF document text
    • https://lidelituni.weebly.com/uploads/1/3/1/4/131452972/delutaf.pdfIn PDF document text
    • https://nejaxadutoxukax.weebly.com/uploads/1/3/4/6/134622523/6784305.pdfIn PDF document text
    • http://devgame.design/2018_toro_power_max_826_oxe_review1fpo3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001047d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047D 4620 bytes
SHA-256: 0a94d5becb4b3f5565fb7a67ff04cb70678a56fe0aa791f5ba630d891423d3c2
font_01_sfnt_off000114e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E9 5596 bytes
SHA-256: 3d0474fde5468d6f5f030c2c6ebbc253132805e98f714ddaed7b07c7d8023b82
font_02_sfnt_off000127e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E9 10072 bytes
SHA-256: 40093265a95d92d41a888163baecca072bd11964fc15f8b583881e5e0e7ddb79
font_03_sfnt_off0001400f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400F 12540 bytes
SHA-256: 39db15570b782b3f1145179fb8eaefee5e51e9217a09d1d91cd2656f0ec921c6
font_04_sfnt_off00016ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AC6 17020 bytes
SHA-256: 3c89797444c00275d09aa6ffd04425aeaa907068d3b5459921e3b2e2976e0c2b
font_05_sfnt_off00018351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18351 6608 bytes
SHA-256: b604613c19ed7d6da0f034cd9db12a51e1cb3d14b43dc477b5efbb9f999519c4