Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a603c7ee8556852…

MALICIOUS

PDF

76.7 KB Created: 2021-03-14 03:04:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8e87e86067548b6fe2cf6a4117c580f2 SHA-1: 91d27c76a21c48660076aee0762706f7f4c95e67 SHA-256: 1a603c7ee8556852127aa7035d2f03e40d0a158c1271f88d1b53b9a90b3e6f48
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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
  • 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://mezovuduw.ru/strik?utm_term=kenmore+electric+oven+quit+working PDF link annotation
    • https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/pukutodibejor-vanupodedarexu-didudizododa-jiteg.pdfIn PDF document text
    • http://eslivdrug.space/jomevabalimobog7v1o.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/giggdxf/dolezenoxoxapifekumevero.pdfIn PDF document text
    • https://zenozuniwilifa.weebly.com/uploads/1/3/4/1/134131556/3342215.pdfIn PDF document text
    • https://rakatifuz.weebly.com/uploads/1/3/5/9/135964199/jewuris.pdfIn PDF document text
    • http://kunepuvobimamin.medianewsonline.com/21221116064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474752/normal_604918eec5dca.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/the_hunger_games_full_movie_download_in_hindi_dubbed_filmyzilla.pdfIn PDF document text
    • https://cdn.sqhk.co/dewobube/mKCDTic/the_new_york_times_subscription.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/gTxibib/watch_with_friends_hulu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365541/normal_5fce67354d2bb.pdfIn PDF document text
    • http://russianpatentexpert.com/samirenabidafozajujilebl8uv.pdfIn PDF document text
    • http://prizinsta.info/how_to_replace_a_2013_equinox_batteryijifv.pdfIn PDF document text
    • http://fipagolanikobax.mygamesonline.org/pendidikan_islam_di_malaysia.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/dyhfjdI/pac_man_championship_edition_2_free_psn.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/antitubercular_activity.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/13571610167.pdfIn PDF document text
    • http://nubatevujonuw.mygamesonline.org/rofifopowowemizagef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forojiwimudobo.atwebpages.com/numb_patch_on_my_back.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/vatobanefaf.pdfIn PDF document text
    • http://butorinowu.myartsonline.com/adobe_acrobat_viewer_apk.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_off0000ef9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9B 5040 bytes
SHA-256: 64ce244dceab489ce9bddcbd1f4cffe03300be862b2fe6975c57c438082b4c02
font_01_sfnt_off000100c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C5 10768 bytes
SHA-256: 345305e644293fc8b939995b20bad5a3f923f20b3a41da84e49d2d0e26ff898b

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