Malicious PDF — malware analysis report

Static analysis result for SHA-256 db387a24e9e0f0be…

MALICIOUS

PDF

77.2 KB Created: 2021-01-29 11:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0fbbdb19a1db95b2ff7d7fdda4a73b21 SHA-1: c2ba76ebef8fcc2946a221cb32321788bedaefd9 SHA-256: db387a24e9e0f0bed610ac72786aa22aafe663e5bd2f336abf1f83385aa24a62
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure suggests it's designed to lure users into clicking these links, likely leading to phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/wb?keyword=school%20days%20anime%20plot In PDF document text
    • https://cdn.sqhk.co/tijinujul/a4mge2B/ghost_killer_1992_full_movie.pdfIn PDF document text
    • http://goodsfor.life/vertex_astrologia21bwk.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/LhdRT3P/17507954252.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/pudexufekaterozutalitap25h4x.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/Gjgzggf/53663023635.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393890/normal_5fef9fee6f113.pdfIn PDF document text
    • http://kerorakesona.22web.org/heart_failure_esc_guidelines_2016.pdfIn PDF document text
    • http://maletewidulebil.iblogger.org/jolejanenedakeguk.pdfIn PDF document text
    • http://abreudesigns.com/5429838778xzvcm.pdfIn PDF document text
    • http://pycnidwzxc.info/miwokizuzepumopod2raw8.pdfIn PDF document text
    • http://pet-guru.shop/jetpack_joyride_free_online_games_to_play7xbmp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366388/normal_5fca03ab83322.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/AAhiMji/rulivewawo.pdfIn PDF document text
    • http://com-servers.online/maps._me_offline_maps_travel_guides_navigationn6rcx.pdfIn PDF document text
    • https://cdn.sqhk.co/rozamulev/jOjjQji/47391951315.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373239/normal_5ff303d229686.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/hejjghV/51673097294.pdfIn PDF document text
    • http://straponartist.com/250732596116i80u.pdfIn PDF document text
    • http://proita.space/36211688112nc1bw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487007/normal_5fd61e71214ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://subedawulowuwo.epizy.com/67785001319.pdfIn PDF document text
    • http://sipariwemarisu.rf.gd/71858134563.pdfIn PDF document text
    • http://sojisij.epizy.com/hrc_evaluation_reporting_system.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A0 5208 bytes
SHA-256: d6764766d77c4cc6bc5068265c9c227834199f8fa392822f161ebbe4de311a43
font_01_sfnt_off0000f523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 10700 bytes
SHA-256: b57bb5628812067dba0cb2dd8f27a254ac88b63caec72ece314ae1d30bffbc6b
font_02_sfnt_off00011989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11989 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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