Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4091f089d65b33e…

MALICIOUS

PDF

115.5 KB Created: 2021-04-01 06:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 149c7e200c53ee406b7f6546474bd1f4 SHA-1: eda4182933f56a6f2b424c8a2c0f6e7a6f7d8761 SHA-256: d4091f089d65b33e2eb9a1f30ffc6f15f46fedfe06635102f30ea618e29eec74
244 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The file contains a large number of embedded links, many of which point to disposable hosting, suggesting a link farm designed to distribute malware or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=10th+class+maths+solution+pdf+tiwari In PDF document text
    • https://lovelutunaguj.weebly.com/uploads/1/3/4/7/134735325/5756355.pdfIn PDF document text
    • http://iglivesupportteam.com/18160706176h9bgy.pdfIn PDF document text
    • http://janipuwibir.mywebcommunity.org/muriwegefazuzigitogijezi.pdfIn PDF document text
    • http://m-ryanaf.site/660827698158oeg8.pdfIn PDF document text
    • https://giwulotasika.weebly.com/uploads/1/3/1/4/131411199/4032055.pdfIn PDF document text
    • https://kimilirakafame.weebly.com/uploads/1/3/4/6/134659192/nasiwelunomidel.pdfIn PDF document text
    • http://mp4.design/construction_business_plan_sample_pdijx1x.pdfIn PDF document text
    • https://weromosamewose.weebly.com/uploads/1/3/4/2/134265498/4848762.pdfIn PDF document text
    • http://fuxuxixigu.scienceontheweb.net/69348566410.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1bc1c71-a5ec-4657-b227-4b1a723a7fef/how_to_replace_jbl_flip_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/nintendo_ds_lite_games_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a0995e4-942f-4ead-b8c8-57f72bed40f8/snow_white_princess_toddler_doll.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd9d2dee-a6fd-4ed5-b0b2-a0a7e7344c5c/learn_how_to_use_epic_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/315bd1bc-1620-4b44-86d8-456b8213806e/dayton_battery_charger_rectifier.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/54393518611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e84673-34e2-4358-8543-91f7688f508d/why_is_my_pet_trainer_collar_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563bc37e-d524-43e3-abda-1e7becb74c49/what_are_the_basic_story_plots.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd6a677-34f0-4b07-ae07-6402b3a30b28/jonenamefopaput.pdfIn PDF document text
    • http://fatavetotujel.onlinewebshop.net/63081597419.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/a_level_physics_book_roger_muncaster.pdfIn PDF document text
    • http://pidodexogejax.myartsonline.com/elements_and_principles_of_design_in_fashion_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/tepulugabujexeburen.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001526a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1526A 5588 bytes
SHA-256: a402b7742ac5136611395d2de1454722c52793e1489963da916d7b75410c1dcb
font_01_sfnt_off00016554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16554 11628 bytes
SHA-256: ecad9e8dd9a1df9a58107c54cd87a646a2492cebf17080aacbf276adbc2382ed
font_02_sfnt_off00018cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CB2 16220 bytes
SHA-256: f88967333ff3bb9045091ce826a70a5e1d98118445c9dda01904003659217686
font_03_sfnt_off0001a246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A246 8932 bytes
SHA-256: 1e0ce053267331cdcda10941e88895b4612ad5795ee1cf1e45e575c4bfbfb78e

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