Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5f7374e5734950…

MALICIOUS

PDF

71.8 KB Created: 2021-03-03 10:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7f05a55fecf4207fd75780754efbb8ab SHA-1: b02b688b06376a52a5c93130761c5353e59dea1f SHA-256: 9a5f7374e5734950a713fc60dbab74957236ea33b08e245fad7389436127742b
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an external URI and an SEO redirector link, both pointing to a URL that appears to be part of a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs suggest a malicious document designed to trick users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://kuzutuzo.ru/123?utm_term=7+years+old+piano+notes+roblox PDF link annotation
    • http://ru-payment.casa/how_to_fix_a_broken_ink_cartridge29vlh.pdfIn PDF document text
    • http://jevufoduxixan.22web.org/39094235019.pdfIn PDF document text
    • http://takojebuti.iblogger.org/bolamense_fc_df_bosque_formosa_ec_df.pdfIn PDF document text
    • http://bionatur.space/is_it_worth_leasing_a_tesla_model_33a1wi.pdfIn PDF document text
    • http://static-get.top/car_raffles_in_californiaoaz43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463279/normal_5ff5f1ee2e4d0.pdfIn PDF document text
    • http://xevuwelepudexo.iblogger.org/ctv_news_sudbury_reporters.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/fogibi/the_winter_of_our_discontent_movie_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/90687963228.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/lamitukimozuf.pdfIn PDF document text
    • http://vatoduk.rf.gd/most_used_gre_words.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/femupilujadar.pdfIn PDF document text
    • http://nupituf.epizy.com/hallelujah_choir_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/medicare_part_d_notice_2019.pdfIn PDF document text
    • http://lodibusalibazi.epizy.com/myspanishlab_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/27775095591.pdfIn PDF document text
    • http://gefafeduvul.epizy.com/90536069985.pdfIn PDF document text
    • http://zupifokurox.rf.gd/14936580989.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_off0000daf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 5248 bytes
SHA-256: 0f2251d122d6e6bd58f50096a6dbf8a6719b7584e38d8a13cf7a4fafd7ed5b1e
font_01_sfnt_off0000ecdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDD 10916 bytes
SHA-256: 87b90ca6a213976c7821ba1f5bbc2637d62f01247d6c9cd138735182e5f6d49a

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