Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a7a1e5c597689d…

MALICIOUS

PDF

90.2 KB Created: 2021-03-30 07:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8a33552b6e1a5b7f8af3f053b4031b74 SHA-1: 1b5ef9d3c367ad2cae10a3ae9b8e304aa976f2b6 SHA-256: 10a7a1e5c597689d7e9ed5484f9ce37cdc6855e9967c602040fec1b2aa55cca9
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 0.9967

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://dugedepap.ru/wix?keyword=alien+taxonomy+project+answers PDF link annotation
    • http://wimuzawoxi.getenjoyment.net/advanced_english_grammar_questions_and_answers.pdfIn PDF document text
    • https://vitasexabu.weebly.com/uploads/1/3/0/8/130813400/8274478.pdfIn PDF document text
    • https://cdn.sqhk.co/redupalulaxo/iegGixv/7284750001.pdfIn PDF document text
    • http://sunugukumota.getenjoyment.net/52548086528.pdfIn PDF document text
    • https://zorusijumabek.weebly.com/uploads/1/3/4/8/134851431/50f65d2c18ab685.pdfIn PDF document text
    • https://cdn.sqhk.co/livaxipovage/jfZjfL3/the_galaxy_survivor_apk_mod_revdl.pdfIn PDF document text
    • https://wugebanog.weebly.com/uploads/1/3/4/7/134709888/a19ec.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/g4n5Up2/35175248645.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/bitcoin_price_today.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/cOzMohz/red_ball_1001_oyun.pdfIn PDF document text
    • https://xetasigebe.weebly.com/uploads/1/3/4/4/134443645/juvakobotumupat-boxazil-ragajorafex-rosusonokor.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/GjdL2ff/sivonumoboguneke.pdfIn PDF document text
    • https://cdn.sqhk.co/pogadidotilu/ePtPlzn/miraculous_ladybug_cat_noir_game_free_online.pdfIn PDF document text
    • https://jizexukufi.weebly.com/uploads/1/3/4/1/134109318/ruvigavi_nedagenezasafa_tubopixabejama.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/MUXgfIp/flight_simulator_games_online_free_unblocked.pdfIn PDF document text
    • https://jibunomo.weebly.com/uploads/1/3/5/3/135348462/9489538.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/ggvggY0/trenches_of_europe_2_apk.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/dell_venue_8_pro_5855_lte_specs.pdfIn PDF document text
    • https://kefexogutifega.weebly.com/uploads/1/3/5/3/135309882/jizasof.pdfIn PDF document text
    • https://vufagejibuto.weebly.com/uploads/1/3/1/4/131483336/17ca14d585135e0.pdfIn PDF document text
    • https://suvewuvasalu.weebly.com/uploads/1/3/4/7/134762181/boxiwosaluvuvekena.pdfIn PDF document text
    • https://cdn.sqhk.co/fofasafiwi/huic6jc/27862471372.pdfIn PDF document text
    • https://linugotozoluj.weebly.com/uploads/1/3/4/6/134662393/40a5a7.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/eghVgii/fruits_mania_fairy_rescue.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/2tgf2rg/fling_fighters_hack_apk_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piwakitidi.onlinewebshop.net/a_raisin_in_the_sun_movie_1961_cast.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_off000120f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F5 5404 bytes
SHA-256: 0958574127ab532662f6c3c772eddaf404ccece3a489a189af1e6eb236c98e68
font_01_sfnt_off00013362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13362 11668 bytes
SHA-256: 5634f0bfc9c6811056e6f7742d6f8766270261917726103354d26d6c66d2e3d0