Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd8059f441be64e…

MALICIOUS

PDF

93.4 KB Created: 2021-03-18 20:20:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 614af023a23e748a5377e6127fac2dc0 SHA-1: 493bd2a5735ca0994a2edc056c5324472b643be1 SHA-256: 3fd8059f441be64e45c03b7793c7a93407ca9f1ae8c02b2652e5716bad599b7e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are obfuscated or lead to suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily corrupted, contains a search query that may be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://resalured.ru/strik?utm_term=does+the+hormone+reset+diet+really+work
    • http://xelirap.22web.org/cabal_online_free_full_client.pdf
    • https://rofixuninapo.weebly.com/uploads/1/3/5/3/135313709/2a29cd70cd0857.pdf
    • http://pigigozoruda.mypressonline.com/26308417435.pdf
    • https://xaledojasuk.weebly.com/uploads/1/3/0/9/130969600/koraba.pdf
    • https://xukifunizagopo.weebly.com/uploads/1/3/4/0/134013279/a3fd00cd1dc.pdf
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/novaruvolorebiniku.pdf
    • http://pilevisuzo.iblogger.org/wordpress_redirects_to_homepage.pdf
    • http://rolapisi.scienceontheweb.net/55340916025.pdf
    • http://warowusavi.mywebcommunity.org/xedilapozujilitezi.pdf
    • https://lidaleteso.weebly.com/uploads/1/3/4/0/134017218/6210796.pdf
    • http://wozekozexufoxol.scienceontheweb.net/wadinodeni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vajefam/tafudixirinidunok.pdf
    • https://s3.amazonaws.com/jugobimuraje/bubble_games_for_android_2._3._6.pdf
    • http://xuwomotibinifen.rf.gd/vivaldi_android_2019.pdf
    • https://s3.amazonaws.com/tinajabizoreguf/9643079742.pdf
    • http://vufepaketotaxo.epizy.com/handel_minuet_in_g_minor_arr_wilhelm_kempff.pdf
    • https://baad1762-ad72-434c-be9a-9de7d8068d01.filesusr.com/ugd/61395f_e0cd4f7f5e894804ae5c476e6afb4b5d.pdf?index=true
    • https://s3.amazonaws.com/gedexim/gepofe.pdf
    • https://s3.amazonaws.com/kakekojezutok/books_to_improve_spelling_for_adults.pdf
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_04e91df668ac409b9cf8747a1c2d3ade.pdf?index=true
    • http://muwumatenenuli.rf.gd/webasto_bunk_heater_maintenance.pdf
    • https://s3.amazonaws.com/verirejon/2006_brute_force_750_performance_mods.pdf
    • https://s3.amazonaws.com/dejolavubukugeb/zogubex.pdf
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_ff21fff24f6f4b44aa12bf1225b21628.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_off0001203e.bin
a4d5bf39f056cd6b5d5b65e0cdf48e6014e8b7dbbbdb5aed8d447b8148a03a93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1203E 5112 bytes
font_01_sfnt_off00013184.bin
1f98ee61a3a81a8b33bd113945b5977a57ba7afe44caaeef9f85acae7706cfe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13184 11132 bytes
font_02_sfnt_off000157a5.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x157A5 4324 bytes

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