Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e831af5bbaa363…

MALICIOUS

PDF

79.9 KB Created: 2021-03-24 07:02:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e8ee7edba998dbd7a1041f7f05ed79e8 SHA-1: 5888ca02bfba5b9a2de8c562f42153ec4acf1799 SHA-256: 19e831af5bbaa363be89b0773e5c8a737f1b9d71a9707765533dacea5e779eef
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to SEO-optimized PDF files, suggesting a link farm or spamming operation. The primary external URI points to a URL that includes a query parameter related to collecting on a judgment, indicating a potential phishing or deceptive lure. While no scripts were explicitly extracted, the PDF structure and numerous embedded links are indicative of malicious intent, likely to drive traffic to malicious or spam sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/strik?utm_term=how+to+collect+on+a+judgment+in+texas PDF link annotation
    • https://cdn.sqhk.co/guvawatuzax/75ig3gi/gosobubilogorixogupisatet.pdfIn PDF document text
    • https://cdn.sqhk.co/wafixagi/cwjcoh4/dabofavefirukaxize.pdfIn PDF document text
    • https://cdn.sqhk.co/radofufalam/1thfn6j/74127604998.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/SUhcqyg/20382240565.pdfIn PDF document text
    • https://cdn.sqhk.co/mapelimujeku/krmjdij/online_colouring_pages_for_kids_disney.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/e16U3n7/prison_break_cast_season_1_episode_9.pdfIn PDF document text
    • https://cdn.sqhk.co/budafitanu/WifPNgd/5620093635.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/herUTia/24284448641.pdfIn PDF document text
    • https://cdn.sqhk.co/volumusigu/dlgh6hb/gevizased.pdfIn PDF document text
    • https://mudatikijamowa.weebly.com/uploads/1/3/1/4/131408537/83cb4504bf7c.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/0icUHgf/world_war_3_movies_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tusenepobam/zZgcjdc/wifi_software_download_for_pc.pdfIn PDF document text
    • https://forugizatufuru.weebly.com/uploads/1/3/1/4/131410167/wenewux.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/j21hcgh/95051044237.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
    • https://uploads.strikinglycdn.com/files/c31539b1-12d1-432a-9121-4c1326ebba4d/lg_air_conditioners_fault_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e717669-854a-4c72-995b-3b43887ba867/70020707914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de4762d-f449-4ac3-8b20-b00c68b3a600/cephalexin_davis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb1b4cd-1daa-4001-8586-2af2fdc6a1ff/what_is_ethical_hacking_in_urdu.pdfIn PDF document text
    • https://777dd155-384c-4f1d-a337-8f27b94bb056.filesusr.com/ugd/1ecdae_92b25aa8b01f499a9ef6dbadb2d4380c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/24851838-db1d-43d4-8792-b041d151ed44/48478543013.pdfIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_61cc3150b3184a278d5ba4b14f3f7f6b.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED71 5240 bytes
SHA-256: b4272e88f40568ef6bc016f3711ed8b0912f300e88cb39f230d17172f905307f
font_01_sfnt_off0000ff42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF42 10872 bytes
SHA-256: 58e387b50331ebacf2649408794b7a6726556896712ba7216f17ed53db9dd684
font_02_sfnt_off00012452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12452 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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