Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a35e18f4723fe0…

MALICIOUS

PDF

82.1 KB Created: 2021-03-20 04:38:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe4dab928369ef4daf5a68fc64edf4ec SHA-1: 7710a6b70eb478dbf366f5c37a2e73faaa45a7d3 SHA-256: 08a35e18f4723fe0ee0fa76959d165d370904570abae86df3144fcc71cbccb39
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are part of a link farm designed to host malicious content. The primary URL, 'https://crophysi.ru/wix?keyword=marvel+future+fight+apk+uptodown', suggests a lure for users seeking game downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://crophysi.ru/wix?keyword=marvel+future+fight+apk+uptodown
    • https://tosixugiza.weebly.com/uploads/1/3/6/0/136052785/didetevuron.pdf
    • http://kudopifupelixi.22web.org/bangla_sultan_movie_song_video.pdf
    • http://nelefir.22web.org/34404686929.pdf
    • http://world-wild-shop.com/volume_of_rectangular_prism_worksheet_word_problemsn6les.pdf
    • https://nawopudupavipe.weebly.com/uploads/1/3/4/8/134856820/8f0066cabdb6b5.pdf
    • https://nulasexojexof.weebly.com/uploads/1/3/4/0/134012614/noratefowogififiwe.pdf
    • http://aduo5.online/rogeweriwulimawuzof84o0.pdf
    • http://wejixekolubuguw.iblogger.org/o_reilly_free_books.pdf
    • http://pobuzajabazuwu.iblogger.org/how_to_be_tourist_guide_in_malaysia.pdf
    • https://lepefolavexar.weebly.com/uploads/1/3/0/8/130874674/6935323.pdf
    • http://uscreditcheck.info/humboldt_broncos_injury_reportlrsnm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bukinajomo.epizy.com/pasefekaguriluxorutivifu.pdf
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_772846a12e26475998546533292311d3.pdf?index=true
    • http://sozanorokov.epizy.com/what_is_a_candlestick_chart.pdf
    • http://firixafuzive.rf.gd/how_to_pick_sentry_safe_lock_box.pdf
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_0f1aaf8bb0ad4fa79bec75b35bf1ccf7.pdf?index=true
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_5fa8a604b61b4fdbaf3862047114e0f9.pdf?index=true
    • http://ribaxexumipo.rf.gd/pdf_notes_of_marketing_research.pdf
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_f5c9cbef7d9c4f4ab3489336c5f8b6ad.pdf?index=true
    • http://zedotedifajo.epizy.com/mokipokugogugevonusezokul.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_off0000ebff.bin
a27947b71e4888dd8db97c4bc20e381b0813cfd0dc4d2d6ac96853bf6b5138a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFF 5228 bytes
font_01_sfnt_off0000fdd5.bin
227a372f3fc2fe952c4d735240284a19a5a78cd411c7c7394ae7718c3dc58513		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD5 14440 bytes
font_02_sfnt_off00012ae1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE1 4324 bytes

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