Malicious PDF — malware analysis report

Static analysis result for SHA-256 460eb919f13a8a78…

MALICIOUS

PDF

71.2 KB Created: 2021-03-02 04:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ff13cc7f3bd4b87f6687622c64087c5b SHA-1: 58ed727c7431accaacb2b516d56ca0bfc56587fe SHA-256: 460eb919f13a8a78e3e358c9ff3f2b0518507b8f57ac67cf3f97e3f08f640f27
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://ponafet.ru/wix?keyword=spectrum+science+grade+7+pdf PDF link annotation
    • https://tenewalewufubin.weebly.com/uploads/1/3/5/3/135329800/zamukegox_zaledewas_durafatisijumuk_getibodas.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/what_diameter_is_a_224_valkyrie_bullet.pdfIn PDF document text
    • http://esagafow.fun/on_my_way_piano_sheet_music_alan_walkerbplns.pdfIn PDF document text
    • https://mexukisigugat.weebly.com/uploads/1/3/4/7/134702857/75e71f6.pdfIn PDF document text
    • https://zavowajasobi.weebly.com/uploads/1/3/1/4/131406950/6233942.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/c2jjejd/vekojozuwonasubekumadi.pdfIn PDF document text
    • https://jowatewiko.weebly.com/uploads/1/3/1/3/131380225/7794726.pdfIn PDF document text
    • https://wavafawiwex.weebly.com/uploads/1/3/2/8/132815000/worixewobuti_dejab_titabaruvel_dejozumopimiw.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/zetapipivexufu.pdfIn PDF document text
    • http://tonagruz.ru/ninudotehmrr.pdfIn PDF document text
    • https://paboripiniw.weebly.com/uploads/1/3/0/7/130739049/zakufexubilowep_kobogebaz_sogozag_lotexiwexes.pdfIn PDF document text
    • http://submonster.xyz/theories_of_motivation_exampleskb1ju.pdfIn PDF document text
    • http://meetsol.xyz/2073242174608zmc.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/jitixukop.pdfIn PDF document text
    • http://50offshop.info/70895584095gn504.pdfIn PDF document text
    • https://fiwitoritare.weebly.com/uploads/1/3/4/5/134582968/jaluvugobatiniza.pdfIn PDF document text
    • http://pifemukopisare.sportsontheweb.net/dremel_7700_cordless_review.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/78148695176.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/bhoot_fm_2_november_2018_episode.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/12766311169.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/30615979204.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91B 5628 bytes
SHA-256: 448cb3cff3aede44f6185a1193c012f7e9cddd1d033c553b3709f576994ff5f9
font_01_sfnt_off0000ec38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC38 10420 bytes
SHA-256: ef65ad9663f008a5a760087db814781fe9320ae8c5e889c1aeb23e371d0268d5

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