Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e08d5e13febd661…

MALICIOUS

PDF

83.5 KB Created: 2021-04-25 17:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1679a7bdaa37250e8b802e9edb1304ca SHA-1: 729bd288490e6865f92864e6647c678aa88fdc0e SHA-256: 7e08d5e13febd6618e017ec965cae144f003045e62031bb0d563d8eddf14b060
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The primary URL, 'https://gimoguvi.ru/strik?utm_term=saga+prohibido+enamorarse+de+adam+walker+pdf', suggests a lure related to a book title, likely to direct users to malicious content or phishing sites. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=saga+prohibido+enamorarse+de+adam+walker+pdf PDF link annotation
    • https://napokepuwaju.weebly.com/uploads/1/3/1/1/131164128/a36e984d568b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419425/normal_5ff8f356b9743.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/gcDaVQ4/pay_wallet_app.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/zjjhgix/hi_gear_basecamp_kitchen_stand.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_606e3e1aace99.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/qnhjdjg/best_ex_structure_deck_duel_links.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/hgjvhJm/kobibesifakonuxov.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/gdHgghr/5_seconds_of_summer_youngblood_music_video_actors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418778/normal_602507e8a6dd0.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/1KmGjd5/easy_simple_veggie_burger_recipe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484122/normal_5fec074a2ed09.pdfIn PDF document text
    • https://nojijakifon.weebly.com/uploads/1/3/4/0/134012839/porom.pdfIn PDF document text
    • https://cdn.sqhk.co/tatudawo/SiaGjfh/xudozusexerob.pdfIn PDF document text
    • https://nelejezubifub.weebly.com/uploads/1/3/1/4/131406077/38233fda2dec9b6.pdfIn PDF document text
    • https://cdn.sqhk.co/boxewemutox/hcKhhib/the_chosen_season_2_episode_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamafuravufezin.epizy.com/shatta_wale_videos_free.pdfIn PDF document text
    • http://gemakeruw.epizy.com/guidepost_tales_from_grace_chapel_inn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda05858-341a-4d0f-a1b3-6161ce6ad8b0/learn_electronics_kit_uk.pdfIn PDF document text
    • http://tezafafowajij.epizy.com/illaoi_guide_s10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8605249-feec-4a76-be3f-167636d20b35/samsung_un32n5300afxza_1080p.pdfIn PDF document text
    • http://gaxosinuda.rf.gd/33451328639.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_off000104be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BE 5852 bytes
SHA-256: 5b92f8747d4c90960bde4277d9883fcf37d3374d140ce86295f350023f859ed7
font_01_sfnt_off0001188b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188B 12264 bytes
SHA-256: 159c697b6d3473d770f1fa25a198a73336b01b7b8d3e69c93cfd577c966a136e