Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a7e406702616a5…

MALICIOUS

PDF

132.1 KB Created: 2021-04-07 11:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b8d779b9acf972ac82957c437fd60350 SHA-1: 8f14b8616fb74f8f1df7b9aa5aefdcb48f063f2c SHA-256: 23a7e406702616a5e08fef769f401f8883ff10096cd72c880d875d7a6b6b42c1
156 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 0.9995

Heuristics 5

  • 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.
  • 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://xajibur.ru/strik?utm_term=simplify+the+block+diagram+of+figure+p.6.7 PDF link annotation
    • https://cdn.sqhk.co/zowajomi/aduIjbJ/58737655941.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/higdLlm/k_yamet_kombat_arena_hile.pdfIn PDF document text
    • https://cdn.sqhk.co/bifoligi/hYk1hb3/cod_cold_war_beta_release_date_xbox_one.pdfIn PDF document text
    • http://durebemidiges.getenjoyment.net/periods_of_english_literature.pdfIn PDF document text
    • http://ladebizelase.scienceontheweb.net/21184934621.pdfIn PDF document text
    • http://nosumiva.mywebcommunity.org/how_to_write_reaction_paper.pdfIn PDF document text
    • http://kidufamipowanot.mywebcommunity.org/landice_l7_error_code_l5.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/hh3ibgg/bubble_freedom_download_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gogonof/cape_cod_fishing_report_monomoy.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/16098944683.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/niwaki.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/stihl_ms_192_tc_carburetor_rebuild_kit.pdfIn PDF document text
    • http://jowosos.myartsonline.com/6459655714.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/zamekaki.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/addictive_keys_studio_grand.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/72834853757.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/50820729573.pdfIn PDF document text
    • https://041bbef9-4dd1-43b9-9ec7-2672afc16ec1.filesusr.com/ugd/686814_93589a69abf345c694cf1c5534407e5a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/78655057813.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/dusivusevapogokivul.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/parathyroid_hormone_stimulates_the_kidneys_to_form.pdfIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_81d3289303cb4b81bdcdcd70bfdc815f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/4173671639.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/befikre_full_hd_movie_ranveer_singh.pdfIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_bb1577c1407a45fbafc4b3210de1ee5f.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C392 6068 bytes
SHA-256: 56a242b21c3b9f313a0732e8199fecb297e49275aa20af2561e95d9e570fa103
font_01_sfnt_off0001d822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D822 12360 bytes
SHA-256: e6a236561ae170ee29e4264c5cb87eb82e3916f8aee6dbc46d256271b71cfa83

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