Malicious PDF — malware analysis report

Static analysis result for SHA-256 186a28128234487e…

MALICIOUS

PDF

77.7 KB Created: 2021-02-28 06:08:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6f6a1faac0909a8d49b636e272576bd4 SHA-1: b438b6373a44b47e2d3278dbca48eb81e79d8150 SHA-256: 186a28128234487ec26f1a739dad860c7fc3841333678fb7144af7c467b24cf0
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-severity heuristic indicating it's an SEO redirector link, likely for phishing or malware distribution. The embedded URL points to a suspicious domain, and ClamAV detected it as a phishing trojan. While no scripts were directly extracted, the PDF structure and URL suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=idioms+worksheets+for+grade+5 PDF link annotation
    • http://siwosupegejolop.medianewsonline.com/how_do_i_fix_incompatible_hp_ink_cartridges.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377928/normal_5fcf44e87bedf.pdfIn PDF document text
    • https://dezegumi.weebly.com/uploads/1/3/4/1/134108828/dukagivoxa.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/jarugen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451766/normal_5fceba86c2ed6.pdfIn PDF document text
    • http://wivevadevenumet.mywebcommunity.org/20404823653.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/woreposefulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461780/normal_5fcfec8c98e8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376372/normal_5fed4def6fad3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mawokale.myartsonline.com/sri_vishnu_sahasranama_stotram_in_sanskrit.pdfIn PDF document text
    • http://zilajib.epizy.com/percent_increase_decrease_word_problems_worksheet.pdfIn PDF document text
    • http://widifusi.myartsonline.com/captain_underpants_the_first_epic_movie_characters.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/estimating_the_prevalence_of_human_trafficking_in_the_united_states_considerations_and_complexities.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/dilapidation_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/zokipelarigokodot.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/i_robot_movie_download_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/68687100213.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/schwinn_270_recumbent_bike_customer_service.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE609 5188 bytes
SHA-256: 1511395f06986709a10c5348999ebcafcde8a6a5372c1e17bebd671f25fb0ead
font_01_sfnt_off0000f7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C8 10468 bytes
SHA-256: 6e0cecb9519c18e6d005e15454beb6a3e3cc43445aa8a876b6effe5b68b03cb4
font_02_sfnt_off00011ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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