Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c85403990b2158a…

MALICIOUS

PDF

87.7 KB Created: 2021-03-24 08:24:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e335e0c1acd8af7671f2483d375c6552 SHA-1: 91c25953863029bc53fd048fd40472a4f0603ff2 SHA-256: 6c85403990b2158a9672ff24e7b06b914e85706e275794348ed91dc4217d036e
196 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses a password-protected-archive lure. 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 0.9998

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=harrison%2527s+internal+medicine+18th+edition PDF link annotation
    • https://gokisixoxi.weebly.com/uploads/1/3/4/1/134108612/2315334.pdfIn PDF document text
    • http://andyhong.blog/table_top_racing_world_tour_apk_revdlc9hdl.pdfIn PDF document text
    • http://bestita.space/wakowutikudipanakenardc14.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/4217fcd149c06.pdfIn PDF document text
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/penorapufewedi-defunedimezoxe-telijifajuzulu.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/zaxawetawupo/what_do_the_different_weather_symbols_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/build_my_life_housefires_lyrics_az.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/fikagofatesoxomuwir.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/cambiar_proxy_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/hand_drawn_animation_sheet_crossword_clue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf6013d-37cd-4a4d-af24-36f013189101/usatestprep_crossword_puzzle_answers_english.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/vefilomixoxagotikanimo.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/how_much_money_does_the_us_postal_service_lose_per_year.pdfIn PDF document text
    • http://kawerulim.onlinewebshop.net/is_diablo_2_still_played.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/cfd_online_trader_platform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08eb2d9e-9319-41ef-ab43-28b248e3d44c/14150351392.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/high_school_chemistry_lab_report_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857f8420-1669-46f5-a49a-9e8e65059fbd/aircare_humidifier_filter_maf2.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E5 5420 bytes
SHA-256: d883c770355d3144bdcda042337d3dc8d74344ee67a213d145ec3bdaf9382079
font_01_sfnt_off0001292d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292D 11844 bytes
SHA-256: e8bfae67efdc2cebb223f15444ac42726d7a2a3008bf518eb9b79e09efe42009

Open this report in the interactive analyzer, or submit your own file for analysis.