Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a9fdd6dedf0f0c…

MALICIOUS

PDF

78.7 KB Created: 2021-06-06 00:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 85143edb27a1960e68cb5378118ce878 SHA-1: 663b29358b4b70b8c30b9e5745f6c4069031dee8 SHA-256: 56a9fdd6dedf0f0c693a838f2c70bfad560c548d9c20f62de07eb4839704dec6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with a significant portion pointing to disposable hosting and employing UTM parameters, characteristic of phishing or malware distribution campaigns. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies the sample as a link farm on disposable hosting, further supporting a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://xajibur.ru/123?utm_term=leaders+eat+last+discussion+guide PDF link annotation
    • https://jabekidedur.weebly.com/uploads/1/3/1/6/131636775/rawedujulejotebopas.pdfIn PDF document text
    • https://tekoxinir.weebly.com/uploads/1/3/4/6/134606092/9251d.pdfIn PDF document text
    • https://kaxagigunuji.weebly.com/uploads/1/3/1/3/131383746/2639923.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/c92f01c7840.pdfIn PDF document text
    • https://velazidolis.weebly.com/uploads/1/3/0/9/130969689/pinetixupudoxob.pdfIn PDF document text
    • https://zufugorutamivas.weebly.com/uploads/1/3/4/4/134401118/e3a4b2.pdfIn PDF document text
    • https://feravenokitaj.weebly.com/uploads/1/3/6/0/136095553/345632.pdfIn PDF document text
    • https://jitebosezukazup.weebly.com/uploads/1/3/4/1/134131420/werabagumewejud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tujelupirobe.pbworks.com/w/file/fetch/144647421/how_to_test_your_intelligence_quotient.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fc6846a-2a5d-4497-8512-bc300baf3b8d/bronnie_ware_the_top_five_regrets_of_the_dying_a_life_transformed_by_the_dearly_departed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15fa717-f77d-46d2-8b85-12d4912b4d9b/how_much_do_tji_floor_joist_cost.pdfIn PDF document text
    • http://wigiwopajuke.pbworks.com/f/51602618806.pdfIn PDF document text
    • http://damopijos.pbworks.com/w/file/fetch/144515424/where_to_buy_gas_powered_go_karts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64ac3ba-c6fa-4d4f-a5f3-e120b467833c/vorobefu.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/w/file/fetch/144629922/52275218371.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/w/file/fetch/144465228/how_do_you_sleep_after_carpal_tunnel_surgery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb89c62-c53d-4524-9fa7-7ce7cfaf266b/55010471295.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144686742/ropiwefujadigixujoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ebc1bcb-5742-49da-bc6f-245e56517911/95633883129.pdfIn PDF document text
    • http://keborekudud.pbworks.com/f/pogapuvujeneno.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_off0000f842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF842 5048 bytes
SHA-256: cc73dcb1de2991b4df537982fbb02f7f728a4aedd5eb61d4fe517087d9f6bc1c
font_01_sfnt_off0001097c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097C 10568 bytes
SHA-256: 8387c6321fd1348bbcb267724a5fc657c1958f42856c188de7f4608c81398ade

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