Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7bc8b6a0d8ade5…

MALICIOUS

PDF

67.6 KB Created: 2021-03-14 05:22:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6b417617a4d7801aec28c005d5f0d70d SHA-1: dd99c427fff8d92332c77e4b33c325b7d719a8b9 SHA-256: 1e7bc8b6a0d8ade5cba2dba34f2a0557bb2b546eb43732658c45ae811d787b30
186 Risk Score

Malware Insights

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

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 0.9992

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 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.
  • 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://dafemum.ru/123?utm_term=globoplay+globo+reporter+de+ontem PDF link annotation
    • https://kubikogemovi.weebly.com/uploads/1/3/4/0/134095998/19fea24898dc9af.pdfIn PDF document text
    • https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/9f626.pdfIn PDF document text
    • http://gebomomeza.22web.org/brandsmart_atlanta_ga_black_friday.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415046/normal_6047f93a537e2.pdfIn PDF document text
    • https://dimitosakusefix.weebly.com/uploads/1/3/4/6/134631941/5704650.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/6hixjcq/44618506686.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492281/normal_5ff7cacbd4b2f.pdfIn PDF document text
    • http://fodosokidorakig.22web.org/intgrale_double_coordonnes_polaires.pdfIn PDF document text
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/5796532.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/jifgjYP/13290211112.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/iLBifhi/billie_eilish_lockscreen_hd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478947/normal_5fe1d1f43c8e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_602c1b75c9b39.pdfIn PDF document text
    • https://tuxativavowaz.weebly.com/uploads/1/3/1/4/131437956/91ec4380fcd.pdfIn PDF document text
    • https://detabifaf.weebly.com/uploads/1/3/1/4/131436978/1586036.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425921/normal_5fed36ddedcf6.pdfIn PDF document text
    • https://cdn.sqhk.co/lexikegije/gg4Yawu/55062235824.pdfIn PDF document text
    • https://zumusikibalagop.weebly.com/uploads/1/3/4/0/134096359/9485142.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/Txji4jf/templar_battleforce_rpg_2._7._3_apk_mod.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/ea2399dd-2629-4db4-a752-dd61179a7113/wejorexijam.pdfIn PDF document text
    • http://vopimivukaf.epizy.com/27857741698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b64b2c-2ea9-466c-9b3b-0c31457c5674/2013_dodge_charger_se_engine_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/172100b1-a5fd-4106-8ee1-c1ec921cbce4/private_practice_season_5_episode_18_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e546ae-57a9-4459-8d37-13a96f67acad/66160466478.pdfIn PDF document text
    • http://kuxusosexoja.epizy.com/2837959260.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_off0000ca89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA89 5372 bytes
SHA-256: aff10727c29cda46ac02551ce303fa992f92b012e9805ee17765269db3f762c0
font_01_sfnt_off0000dcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC5 11308 bytes
SHA-256: 220a42806d0230f1e83a949019068a54a75b7fdeb0604ef152cb6606de595f23