Malicious PDF — malware analysis report

Static analysis result for SHA-256 d154d74758129906…

MALICIOUS

PDF

86.9 KB Created: 2021-05-08 18:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3852b29e87b9cda6c6ad252a2721c51b SHA-1: d08c0fba2af8995df3ad56c032ed820545585a21 SHA-256: d154d74758129906191e691ffd046f719ff9c859d6e2924b95c1c36bb1580c4f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm or SEO manipulation scheme. The embedded URLs point to various domains, including weebly.com and sqhk.co, which are often used to host malicious or spam content. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=canon+430ex+ii+used
    • https://cdn.sqhk.co/temirikuji/ci6rgfg/zedupinujijagimetixa.pdf
    • https://desebenenoda.weebly.com/uploads/1/3/5/3/135348916/2803242.pdf
    • https://cdn.sqhk.co/gatezoru/cRhbUhf/guess_the_country_flag_easy.pdf
    • https://cdn-cms.f-static.net/uploads/4376120/normal_601b7d4e5e94e.pdf
    • https://bigeriburaline.weebly.com/uploads/1/3/4/3/134334921/pevolodapero_zegujuzokoxob_dupejebugegeg_fofibu.pdf
    • https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/7255091.pdf
    • https://cdn-cms.f-static.net/uploads/4421767/normal_60401b5c3eb86.pdf
    • https://cdn.sqhk.co/fujotojaxob/jhhhha3/thrift_shop_super_clean_lyrics.pdf
    • https://cdn.sqhk.co/suzeboxiwo/94iimig/space_heater_with_thermostat_reviews.pdf
    • https://cdn.sqhk.co/regomesu/Bhdgiij/41479952237.pdf
    • https://static.s123-cdn-static.com/uploads/4465127/normal_5fcf43f3204a6.pdf
    • http://vevudonebagitek.iblogger.org/joint_probability_and_conditional_probability.pdf
    • https://cdn.sqhk.co/nenuguvan/Ce5dLgc/badshah_telugu_movie_video_song.pdf
    • https://cdn.sqhk.co/zegofurop/cjd0hcP/mortal_kombat_12_ps5.pdf
    • https://static.s123-cdn-static.com/uploads/4427499/normal_5fdd5c5258518.pdf
    • https://revininone.weebly.com/uploads/1/3/1/3/131380081/wiferis.pdf
    • https://cdn.sqhk.co/joxesinejag/Z3jdhiE/xosunabuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vasofirida/25358821483.pdf
    • http://xatenekoroxaju.epizy.com/10690747581.pdf
    • https://s3.amazonaws.com/kubafezin/68641170449.pdf
    • http://zeluzara.epizy.com/channel_13_news_rochester_ny_reporters.pdf
    • https://s3.amazonaws.com/xupovobejanam/52912740578.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011571.bin
3bf5703132cf28d8779398f07eaef8374ea51cef6590bf27dec5392fe78b6adc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11571 5060 bytes
font_01_sfnt_off000126bb.bin
8d3b08721068ea2aeb10fbbe9d66fe978917708bd5ec93bba3fdd58b0145a859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126BB 11772 bytes

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