Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c0ae2df3c7e881…

MALICIOUS

PDF

76.1 KB Created: 2021-03-14 17:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ee8c122ee8a0c1d396817b145c1a66b SHA-1: d001928cd4f5349ae8d60ff43d1707ff89512a36 SHA-256: 26c0ae2df3c7e881eb450b40e58c640970a6a6abac54e1a47ccf0b7b63c3bf86
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one suspicious URL identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/123?utm_term=store+bitmap+image+android
    • http://lalexejiwisejul.iblogger.org/nefenofusijowapunugali.pdf
    • http://bebarupeludif.22web.org/cheat_hungry_shark_evolution_android_no_root.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_02810c59e0504b56ae461e79ee320c14.pdf?index=true
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_b65d317e362b4fd3a7bc8cab84f74bc7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1922c9bf-96fc-4ab4-b4a4-f051b723b1ce/wahl_km_cordless_dog_clippers.pdf
    • https://s3.amazonaws.com/nonipesikiri/what_are_two_similarities_of_arteries_and_veins.pdf
    • https://uploads.strikinglycdn.com/files/03464ce3-820e-4069-b2b8-575172841a0b/a_brief_introduction_to_fluid_mechanics_5th_edition_young_solutions_manual.pdf
    • https://s3.amazonaws.com/kelageketisefuv/fesegagideno.pdf
    • https://uploads.strikinglycdn.com/files/446a3db6-599f-435a-b1a8-08280f325260/data_mining_tools_2020.pdf
    • http://rudemunipa.epizy.com/aha_acls_new_guidelines_2015.pdf
    • https://uploads.strikinglycdn.com/files/0c14c369-4eae-492c-bc18-df2044719e4d/klipsch_r-10b_tv_remote_programming.pdf
    • https://uploads.strikinglycdn.com/files/027f2e38-3690-4198-b5f1-54bceee09fba/bypass_toner_light_on_brother_printer.pdf
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_2daeef122bc64a8fbcb5e0ea2b6f8c4d.pdf?index=true
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_95fd608fa4f2499480bc67acd705fc64.pdf?index=true
    • https://53ee2ee6-42da-4c96-954f-60f726bc8d53.filesusr.com/ugd/de2744_ee206c4ab8a94c219af1044ab6482622.pdf?index=true
    • https://s3.amazonaws.com/gofilafixu/steam_for_mac_pro.pdf
    • https://77abcf6a-1f47-4233-a5f7-28832101be0a.filesusr.com/ugd/e29e5c_6c3f5dbae5924fa5ac9e34bb532baeee.pdf?index=true
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_70ad56923fc346b58b0c0992cb2ea848.pdf?index=true
    • https://s3.amazonaws.com/nademopor/carlisle_weather_report_pennsylvania.pdf
    • https://s3.amazonaws.com/kibavutibeved/raw_feeding_dogs_guide_uk.pdf
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_1cafb94710cc48e9ac37996f743a02b1.pdf?index=true
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_57a85fd7d9ad492dbd471e6722a831df.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_off0000de12.bin
60bae0fbd3a99d9d1a3c6b5255cff91a484673a413c02e343d9ec2dc37077d05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE12 5100 bytes
font_01_sfnt_off0000ef36.bin
85dac1e6eb31eec29398a97f5161ac8269d375aea248aab2edafafb5eeb5b1a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF36 11140 bytes
font_02_sfnt_off0001155b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1155B 4324 bytes

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