Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e2410720220b99…

MALICIOUS

PDF

86.1 KB Created: 2021-03-31 04:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d82c34fd713959bdf1402d2b8e07f69f SHA-1: d22494b84783f446991d15ff813ceb770560739f SHA-256: a0e2410720220b9986a8ba52fc100436ee5bee63770d39ac4e22b74283997525
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, many hosted on disposable domains or free hosting services, indicating a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://resalured.ru/award?keyword=diviser+pdf+a3+en+2+a4 PDF link annotation
    • https://xaluromaw.weebly.com/uploads/1/3/4/8/134862284/0f0d31b.pdfIn PDF document text
    • https://latopekezap.weebly.com/uploads/1/3/1/4/131437375/756aeb61b.pdfIn PDF document text
    • http://salegejesololo.iblogger.org/wigovabik.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/xgeTNif/gemad.pdfIn PDF document text
    • https://gavokafiwafez.weebly.com/uploads/1/3/1/3/131381231/lurarigenufexo.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/WhfjcCz/76654548955.pdfIn PDF document text
    • https://lerelapukuvi.weebly.com/uploads/1/3/0/7/130740054/7994320.pdfIn PDF document text
    • http://dipitazifageb.iblogger.org/gozepun.pdfIn PDF document text
    • https://cdn.sqhk.co/subesanodag/xyihiak/sagodemixejomabofifole.pdfIn PDF document text
    • https://tisavivo.weebly.com/uploads/1/3/4/0/134040567/sizipepogenafimiwux.pdfIn PDF document text
    • https://cdn.sqhk.co/rebabafa/gjgjdRr/anime_boy_skin_for_minecraft.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/ghj8LNv/car-_categories_road_trip_category_game.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/jowidumunera_lenine.pdfIn PDF document text
    • https://cdn.sqhk.co/zepaginu/UMITajj/movies_2019_action_list.pdfIn PDF document text
    • https://patawera.weebly.com/uploads/1/3/4/1/134131312/3908183.pdfIn PDF document text
    • https://wugovokida.weebly.com/uploads/1/3/4/3/134319073/gunapuped-teliwekepowu-xololilurev.pdfIn PDF document text
    • https://ranezilipevag.weebly.com/uploads/1/3/5/3/135392607/864f88e75d750.pdfIn PDF document text
    • https://cdn.sqhk.co/dimasemi/ihhioFT/manualidades_hechas_de_papel_bond.pdfIn PDF document text
    • https://vinaribibivo.weebly.com/uploads/1/3/1/8/131871854/dab6ede1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fizenigapajawak.epizy.com/bajavirafod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4b2721d-6a25-4041-8295-16473818be32/ariens_snowblower_engine_oil_leak.pdfIn PDF document text
    • http://rejamokag.rf.gd/4082698729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c761c0-6f9f-48f9-9e9b-817506df968d/67966868068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9547d814-54b2-49d9-82ca-5e6935072aa9/android_development_course_fees_in_mumbai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63a8c2a-5214-441c-9f8b-e16879883f07/how_to_put_britax_car_seat_in_car_without_base.pdfIn PDF document text
    • http://dowirimidezifa.rf.gd/sda_bible_study_guide_lesson_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99d950e5-c107-4404-8119-69f6f7f9cb55/xalawemufujoruzid.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBA 5044 bytes
SHA-256: 0f6ab2889016d8c411fd28165d65d6080dbe376099bd64d545c7fc41a659b43d
font_01_sfnt_off000110f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F2 14008 bytes
SHA-256: 36dab4b16f10f5264f5858eb2918c8f943eb2bbca2f6af1d0bee8f823a85711b
font_02_sfnt_off00013b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B57 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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