Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2162934b76c834…

MALICIOUS

PDF

84.2 KB Created: 2021-03-24 06:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c19eb1d0d7b9d445b04a0524035e37f9 SHA-1: 45ad91eaa4e52f89996c91e6763765a1fb886176 SHA-256: 6a2162934b76c8341a43c52f0c16a31649b502d27254cf19da4fccfeb0b8a1bb
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm, potentially for SEO manipulation or to host phishing content. The embedded URLs point to various domains, including disposable ones, reinforcing the suspicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://druttle.ru/wix?keyword=dolphin+olympics+unblocked+66
    • https://gereveporona.weebly.com/uploads/1/3/0/7/130775593/fapobizozoxaruvun.pdf
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/dulesedi_xujas.pdf
    • https://balimalovi.weebly.com/uploads/1/3/2/7/132710770/1462556.pdf
    • http://calipshatngaccs1.xyz/jinibupavawovumoguraie1ge.pdf
    • https://jotigigej.weebly.com/uploads/1/3/0/7/130739509/ef697025d2266d.pdf
    • https://jafipununevov.weebly.com/uploads/1/3/0/8/130814040/wedalopuweboto.pdf
    • https://bufaxivija.weebly.com/uploads/1/3/1/3/131383981/86a551.pdf
    • http://domainlimax.xyz/what_kind_of_chai_tea_does_dunkin_donuts_usefrzvp.pdf
    • http://limaxinsto.xyz/838457151203lv34.pdf
    • https://nukanepinax.weebly.com/uploads/1/3/1/4/131454046/xigedavok.pdf
    • https://cdn.sqhk.co/peluxisomex/jhicJhe/25097763137.pdf
    • http://ruwemipuwev.mypressonline.com/86423374806.pdf
    • http://good-production16.site/netgear_wireless_adapter_wnce2001_instructionstsvfx.pdf
    • https://tabanaxil.weebly.com/uploads/1/3/1/8/131857193/b11401ddce0c5.pdf
    • https://cdn.sqhk.co/vekunego/9Wiiief/meme_soundboard_ultimate_2018.pdf
    • http://wovuwukotuvoxi.mygamesonline.org/99340599406.pdf
    • https://rawoxoduzipuk.weebly.com/uploads/1/3/2/3/132302868/94c7a0cf4685b.pdf
    • https://vawemuziz.weebly.com/uploads/1/3/5/3/135351027/jezenozu.pdf
    • https://cdn.sqhk.co/noxisoture/utjfidH/multiplayer_car_racing_games_unblocked.pdf
    • http://sunakijabe.sportsontheweb.net/advanced_excel_2020.pdf
    • http://pogawubujogeje.mypressonline.com/edit_to_word_converter_online.pdf
    • https://cdn.sqhk.co/kofatuziwu/jo513gj/dragon_ball_z_infinite_world_pcsx2_cheats.pdf
    • http://kavademive.sportsontheweb.net/adverbs_of_frequency_exercises_with_key.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gototura.myartsonline.com/why_do_i_argue_with_myself.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f12f.bin
465857f5da39d30b2815720f5d47178656400fb0c5be58a6fbfdfb0070b82e6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF12F 5464 bytes
font_01_sfnt_off000103a7.bin
8fc926bfb8e83bece247a363d0b8c1453c8651ef9acc20ffc8285bd1b7d48a68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103A7 13392 bytes
font_02_sfnt_off00012e88.bin
149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E88 16036 bytes

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