Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c17a0b622691d1…

MALICIOUS

PDF

97.7 KB Created: 2021-03-31 06:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7e5a9aeb579fbf70f6c686649771a047 SHA-1: 570bfe6a298ec5ed2b298588e0fdbcd435da783d SHA-256: 04c17a0b622691d10a1560a9c38fecb5fe5371649abfcc258148a20fdb5d9193
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 0.9990

Heuristics 6

  • 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 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://vilenefex.ru/strik?utm_term=what+is+quorum+of+lok+sabha PDF link annotation
    • https://futinenapol.weebly.com/uploads/1/3/1/4/131438538/9732697.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/hfgiTIK/at_t_tv_now_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/iEhfiaE/kanye_west_only_one_audio_download.pdfIn PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/kufuvudawuma_nonesexikelisat.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/YX4rsje/supongo_in_english.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/romeo_and_juliet_song_playlist_project.pdfIn PDF document text
    • https://fiwerabonu.weebly.com/uploads/1/3/4/3/134347662/8090fc4e94e556.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/3ihujco/bijewadasisexatevoxa.pdfIn PDF document text
    • http://sokixatov.mywebcommunity.org/gasivi.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/gkhal6K/80612537896.pdfIn PDF document text
    • https://cdn.sqhk.co/zanewijepex/pFgjjhB/53636880475.pdfIn PDF document text
    • https://borubuzas.weebly.com/uploads/1/3/4/0/134042729/gatebilobus-bigebu-gavukafepodifa.pdfIn PDF document text
    • https://cdn.sqhk.co/bularalunop/liidvge/82577479703.pdfIn PDF document text
    • http://vujenixuwo.mypressonline.com/pobepinodijanodimow.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://vufigenetusanu.epizy.com/divi_aruba_map.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_af47b995a7134059aee4a526ebcc6c32.pdf?index=trueIn PDF document text
    • http://zugepoguj.onlinewebshop.net/tisojofirogoduz.pdfIn PDF document text
    • http://witopovuketoj.epizy.com/91608996317.pdfIn PDF document text
    • http://tinejamuwaki.epizy.com/4361731416.pdfIn PDF document text
    • http://pexirud.onlinewebshop.net/lazowif.pdfIn PDF document text
    • https://4900ecec-7ac1-411c-be2c-b077674085c8.filesusr.com/ugd/493135_1371ba699a5d489db11ab9e1061476fa.pdf?index=trueIn PDF document text
    • http://fexulumusevemi.rf.gd/importance_of_biosecurity.pdfIn PDF document text
    • http://xexojonorowo.epizy.com/sabumajofibotomaforazasol.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_off00013171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13171 5008 bytes
SHA-256: d2fd83314865cf7373fb482b6ca7ce1f7c7f34d4f531ac37c7ad9ca575f46535
font_01_sfnt_off00014282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14282 12456 bytes
SHA-256: 6afca4ebcc60458b39d2fb0c6811b08bac2275469d0c4992246c1bf6659a5931
font_02_sfnt_off00016b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B36 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378