Malicious PDF — malware analysis report

Static analysis result for SHA-256 44226e88fed28109…

MALICIOUS

PDF

82.9 KB Created: 2021-05-15 10:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4eb222373755c79dd2b289444a60bd9b SHA-1: d06badb3694e75b369bd3a353c41b9f697729aa2 SHA-256: 44226e88fed2810953e874eb3ad04e031e06c472e0575494a9111bdef159c9f4
156 Risk Score

Malware Insights

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

The PDF file contains a link farm and an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, potentially leveraging embedded JavaScript for obfuscation or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=how+do+i+set+an+intermatic+outdoor+timer
    • https://cdn.sqhk.co/woxemumi/dhdggma/the_cat_in_the_hat_builds_that.pdf
    • https://cdn.sqhk.co/lebereme/iidhiTZ/skins_on_netflix_season_2.pdf
    • https://cdn.sqhk.co/dugelabomaw/hcA7icA/moxokadoxajad.pdf
    • https://cdn.sqhk.co/ketofebem/hjighaP/macpherson_report_double_jeopardy.pdf
    • https://cdn.sqhk.co/nimuxugemu/haf5akF/download_battle_city_tank_1990_cho_pc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_5ced8689b8a9444c894a722446c5b77d.pdf?index=true
    • https://42cc6f6d-9125-48bc-bce4-1bf15f49b1be.filesusr.com/ugd/7c30af_cf140c7a9c374d94af4d119710005056.pdf?index=true
    • https://502e425a-54a0-4661-a3e6-c6e116bdb13d.filesusr.com/ugd/10da26_8e2cab6458fc46eb8779c5c9ff18fe04.pdf?index=true
    • https://uploads.strikinglycdn.com/files/20b9530c-c896-4cc3-9068-393d00fac888/how_to_replace_liftmaster_battery.pdf
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_7e1b8a6ef8c341e8a1ceffcd0f679100.pdf?index=true
    • https://s3.amazonaws.com/gawabog/starfinder_rpg_review.pdf
    • https://1f53f175-067f-4140-b001-f66bebc9855b.filesusr.com/ugd/c711d8_6f82126e57bb43fe8e26e96060815540.pdf?index=true
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_5c1df6778bf94cc5a8d38b9daf766344.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4cb9d241-d91b-4170-9fd8-4ebb82382b71/12101420131.pdf
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_feec9f1be5bd4a68a6f1b01d4d260334.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5cb41b79-61ef-472a-93b9-4748aec914d7/volkswagen_polo_gti_service_schedule.pdf
    • https://s3.amazonaws.com/zeworibuzoza/9345849654.pdf
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_cf70743f3ee24e94aad756832af8b35a.pdf?index=true
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_66704c0eb6a4405181476f450a8a0d3f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/85c1d3d1-c613-4bb4-b3dc-364bf3e52fe0/2026592911.pdf
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_cfc3c91003964e5da912612c162464b3.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8ee.bin
d95fd4e3f57d3aa3a46e9a3a7dfa896a2de251d891aea6fd02d5d101fc6ad176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EE 4988 bytes
font_01_sfnt_off000109d4.bin
ab33dd02661b6ed409badb9f9068389fa4ce9203cf03338068dcbc6ae13226e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109D4 11164 bytes
font_02_sfnt_off00012fdc.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDC 4324 bytes

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