Malicious PDF — malware analysis report

Static analysis result for SHA-256 a437fa132588f2ff…

MALICIOUS

PDF

78.2 KB Created: 2021-03-22 06:34:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 180cb2c8b1b39cbbadbe95599d18ed44 SHA-1: 5c5bed8f71b44e283a328d1095e69e2c039d8486 SHA-256: a437fa132588f2ffaef5930c3a5e4bec6a5134f20d2443ade75f82c9fd712e3e
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 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=what+are+six+advantages+of+budgeting PDF link annotation
    • http://meetsoda.club/what_is_the_difference_between_single_booster_and_double_booster_stabilizer2xmtn.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/Bnzgchb/lightroom_download_presets_free.pdfIn PDF document text
    • http://ijmalan.xyz/51504566048k7xei.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/dyson_ball_animal_pro_upright_vacuum_reviews.pdfIn PDF document text
    • http://wowovamofuzo.sportsontheweb.net/adobe_acrobat_pro_extended_to_word.pdfIn PDF document text
    • http://radapox.iblogger.org/gewofexatawi.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/afhglUl/oscar_awards_2017.pdfIn PDF document text
    • http://zawoxilejaku.66ghz.com/byomkesh_bakshi_all_movie_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/jgD3jhl/deduwek.pdfIn PDF document text
    • http://guparob.mywebcommunity.org/rigapilifogubizavo.pdfIn PDF document text
    • http://nagesebaz.iblogger.org/federal_sentencing_guidelines_for_organizational_defendants.pdfIn PDF document text
    • http://dutarotanazosuv.medianewsonline.com/94678470011.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/t_mobile_high_speed_home_internetkg9tm.pdfIn PDF document text
    • http://fosakilatugok.iblogger.org/26398440486.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nukilaba.myartsonline.com/stock_market_live_feed_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d00a8dc-3d64-435b-ba40-10cfd1700903/xaxaja.pdfIn PDF document text
    • http://zubuzonaf.rf.gd/84369939501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d6f2cc1-0f86-4e33-9516-fb9f54c9f81d/65584746652.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/95884234675.pdfIn PDF document text
    • http://natizuf.onlinewebshop.net/duruv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/925a75d7-5d20-43fb-a994-1f7336bd4df6/vixijavilesave.pdfIn PDF document text
    • http://guxejusoselota.myartsonline.com/what_are_the_5_teaching_strategies.pdfIn PDF document text
    • http://fidegaf.atwebpages.com/how_to_connect_onn_soundbar_to_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b02e9cdb-dfdb-4cec-9fa0-4502fc12d01f/what_are_the_instrument_used_to_measure_current_voltage_and_resistance.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_off0000f3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DD 5420 bytes
SHA-256: 87a30b3862fe46447c38b78be5d5cb90d174c6a4e355f8c0ea26ccea732f2b36
font_01_sfnt_off00010659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10659 10712 bytes
SHA-256: 84212419ecfb44718a2f4f02c27cca5993a9973bf20ebdd77addc2200e89651e

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