Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3606db4f6cedd89…

MALICIOUS

PDF

76.5 KB Created: 2021-03-09 08:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 37e6dbb4cbd7d15eb1b12dc3527d5d23 SHA-1: 92d2f6ecaba57df7803554bcf397f155129f485e SHA-256: d3606db4f6cedd89fa30a0e9bc5c7b79c2bd4f85f3478285acc9eb36b71660b8
84 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure for a '2019 calendar template australia free' and includes a high-severity heuristic firing for a redirector link. The ML classifier also strongly indicated maliciousness. The embedded link redirects to zajinet.ru, which is likely part of a phishing or malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/123?utm_term=2019+calendar+template+australia+free PDF link annotation
    • http://kuxafazugof.iblogger.org/jekazufaf.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/ejcPibw/91125129840.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/Jhiichh/hero_xpulse_200t_bs6_price_in_nepal.pdfIn PDF document text
    • https://cdn.sqhk.co/dozumapufa/idRAQRI/drift_race_mod_apk.pdfIn PDF document text
    • http://wumawof.iblogger.org/fomenomokakupidej.pdfIn PDF document text
    • https://cdn.sqhk.co/gavivevok/eHii5Mw/music_line_let_the_games_begin.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000ec0b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000ec0b.bin)
    • http://fejivexol.epizy.com/jazuwejelenu.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/how_to_answer_political_science_essay_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/3351426102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9203523c-d0b5-4822-a5c3-7bb119704328/73474196473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdcf1787-f4ee-4791-83d5-1622756feb8c/bagatesebemudulazefubam.pdfIn PDF document text
    • http://vuxijupobagaf.epizy.com/striped_linen_sheets_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/21754738606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0254e3-904f-457e-99a9-16f4d3fc0853/how_to_tie_knots_for_salmon_fishing.pdfIn PDF document text
    • http://sibovup.epizy.com/81981166448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3b6597b-638f-4cdf-bdc3-b4eb94cb3000/sumefemosen.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/17128479817.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/wulatirowisusepulari.pdfIn PDF document text
    • http://wipapirub.epizy.com/13196986056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0adbf9-5774-478d-92b0-2139575ed4d5/tom_clancys_rainbow_six_vegas_2_trainer_v_1.03.pdfIn PDF document text
    • http://pidejekakej.epizy.com/womivopivo.pdfIn PDF document text
    • http://xovimed.rf.gd/95091809300.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 extracted file (font_00_sfnt_off0000ec0b.bin)

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_off0000ec0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0B 5688 bytes
SHA-256: 791b0362b4425447e0d90447cebd52f077f62ed6a12e2096cd8b86f4388cee76
font_01_sfnt_off0000ff47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF47 10932 bytes
SHA-256: 9cc91e04953cc51f13342da18762e16647ae2ffbcd708e78cf7f615977891976

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