Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83598ba44fe258c…

MALICIOUS

PDF

81.4 KB Created: 2021-03-10 02:10:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a39c175e601440900f8ea0a1c2ffa6f3 SHA-1: 5994216d74d2548c1fcf50483d7c7db965939018 SHA-256: c83598ba44fe258cc9668b20423762da051df47998e13f9b36f75a2bd6d84839
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 0.9993

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://maypoin.ru/aws?utm_term=does+sketchup+free+have+3d+warehouse PDF link annotation
    • http://instapriz.website/dead_space_mobile_free_iosc0r2n.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/gMpzohg/davulinutivugibujerugazik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_603f0cbfd28ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482870/normal_603740d50ce3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448740/normal_602be861254f8.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxexaxi/uhjjjpV/pofafitebulomasevedimotij.pdfIn PDF document text
    • http://arendaavto.taxi/nopuramih6xb5.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/who_is_the_most_ugliest_in_kpop.pdfIn PDF document text
    • http://nutristrike-shop.ru/fnaf_world_unblocked_gameseulfy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460457/normal_5fc69ee889878.pdfIn PDF document text
    • https://cdn.sqhk.co/xogixute/Atc2gif/flower_flex_background_design.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_6019d2d247df7.pdfIn PDF document text
    • http://fapseo.ru/vamutebajutuvalupunes4twsy.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/bukupazurefuvimirawonwwl8.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/naxezenalipoxamum.pdfIn PDF document text
    • http://idealicait.site/xedurofiginivawibujuzimbehq3.pdfIn PDF document text
    • http://mkuu.club/what_is_the_best_soundbar_for_tv1b0vl.pdfIn PDF document text
    • http://itverys.space/ababanna_bongo_musichxl91.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/jetizepofomigukituzefisiz.pdfIn PDF document text
    • http://degakak.sportsontheweb.net/bill_nye_the_science_guy_rocks_and_soil_answer_key.pdfIn PDF document text
    • http://drenajkrasnodar.ru/45129444320qqpjf.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/hi9ggdV/sims_4_mobile_hack_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojibovel.myartsonline.com/flower_shop_business_plan_philippines.pdfIn PDF document text
    • http://witesenigo.atwebpages.com/bahaya_boraks_bagi_kesehatan.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_off0000fe99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE99 5592 bytes
SHA-256: 9029c5bc3982fe5e4cc5f8671792955e72ce7dc87404b02533008e356a59dffc
font_01_sfnt_off000111ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BA 11196 bytes
SHA-256: 9136c371abddfe8e3764949d4c1316c6729660980d255c631daf1515c8993ade

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