Malicious PDF — malware analysis report

Static analysis result for SHA-256 63048e5edf2465e2…

MALICIOUS

PDF

73.9 KB Created: 2021-03-22 13:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fe4e8cdaceeadbb4885c0b8d5755f60 SHA-1: e9caf4dc521db67cd1e6c61eb36eef815c3b5a9a SHA-256: 63048e5edf2465e21548bdf59b4841bb0cdfcd6df63a3caddaf2181143b696d0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic firings point to the document containing a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the embedded URIs, 'https://nipisod.ru/aws?utm_term=pilgrim+progress+movie+free', is particularly suspicious and likely serves as a lure to a malicious site. No scripts were extracted, but the structure suggests it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=pilgrim+progress+movie+free
    • https://cdn.sqhk.co/borefigux/lghuTas/8224473480.pdf
    • http://kaxidabifibag.iblogger.org/berberine_vs_metformin_ampk.pdf
    • https://wuzinetasinozud.weebly.com/uploads/1/3/1/6/131606123/guxomawemepo_xexixi.pdf
    • https://cdn.sqhk.co/nukusigemug/iegiggd/boomerang_full_movie_dailymotion.pdf
    • https://tukusalo.weebly.com/uploads/1/3/0/9/130969921/wosalilalalorep.pdf
    • http://pewodaz.22web.org/ravenfield_beta_5.pdf
    • https://wovofonunubani.weebly.com/uploads/1/3/1/4/131408017/lowida_pagevegelidexuv.pdf
    • https://gidixolatuloxag.weebly.com/uploads/1/3/1/0/131071157/retemi_zenobubovalog_votufiri.pdf
    • https://cdn.sqhk.co/zumedizojas/Chbhgjf/13225835163.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/74b3790a-461b-4976-9469-ed47d637c3db/pozuwudedozub.pdf
    • https://uploads.strikinglycdn.com/files/2b9adca9-adda-4e7a-bea3-2b298e093ebb/55523287980.pdf
    • https://uploads.strikinglycdn.com/files/c9f00f12-a324-4277-8393-38bb13a020e9/log_ti_89_titanium.pdf
    • https://uploads.strikinglycdn.com/files/abdca327-3b21-4792-902f-72fa7eb3e990/3943202796.pdf
    • https://uploads.strikinglycdn.com/files/837ef31f-c2aa-4cc1-ae20-69751cb81433/what_are_the_types_of_lines_in_technical_drawing.pdf
    • http://zufavubop.rf.gd/how_many_calories_in_a_wendys_burger_without_the_bun.pdf
    • http://tefojapi.rf.gd/factory_farming_advantages_and_disadvantages.pdf
    • https://uploads.strikinglycdn.com/files/a9cfa3ee-e282-492f-b7d2-eedc2da9b773/blank_map_of_washington_state_with_rivers.pdf
    • https://uploads.strikinglycdn.com/files/7e20df9b-14e9-429b-b9a1-e4ac33eef76f/dbt_therapy_meaning.pdf
    • http://feletik.epizy.com/wadomanilejoka.pdf
    • https://uploads.strikinglycdn.com/files/0aae8167-6429-4ae8-b821-493464b743cb/how_long_does_it_take_to_prepare_for_the_phr_exam.pdf
    • 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_off0000d56b.bin
8ad46e00150913ba644a26eb491788b311e58fedca445b3a0a8bed523bc5deab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD56B 4676 bytes
font_01_sfnt_off0000e54a.bin
b294eae085226884e875397101d6af409582f1a57965b17ae64e8f757b649536		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 10820 bytes
font_02_sfnt_off00010a5b.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5B 4324 bytes

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