Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bb1b72ddfb96b3c…

MALICIOUS

PDF

80.8 KB Created: 2021-03-20 12:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 86726651cfee303a681b29b47fd045d1 SHA-1: 87d9c8c4e40b748b41c75bba18dc1e46a380d149 SHA-256: 6bb1b72ddfb96b3c22d5ee746f4a2620904164bb64d74933b3bde27e2500519d
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 0.9993

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
  • 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://vilenefex.ru/strik?utm_term=songs+that+bring+back+memories+quotes PDF link annotation
    • https://tesewipelevifiv.weebly.com/uploads/1/3/3/9/133997178/02b17.pdfIn PDF document text
    • http://tujidal.mypressonline.com/head_first_java_3rd_edition_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491933/normal_5fe97a150c982.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/y5iz8ja/jetinifovadere.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/80914808642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447108/normal_6039bfb171b28.pdfIn PDF document text
    • https://kifewaremavej.weebly.com/uploads/1/3/1/6/131606874/05a8054.pdfIn PDF document text
    • https://cdn.sqhk.co/roziguze/NEjf9ig/fix_running_toilet_water_level_too_high.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403129/normal_5ff3b2b6c15ca.pdfIn PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/wutaxuz.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/ibgc1jf/trials_frontier_best_bikes.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/practical_genetic_counselling_7th_edition_free_download.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/3747803.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/jePhjuE/bolotoxijepegag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389830/normal_5ffc80d92ca54.pdfIn PDF document text
    • https://zosotise.weebly.com/uploads/1/3/5/3/135393527/debufizujexegubel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb9aa89-a537-4e70-8981-93413e85d7ab/sony_vegas_pro_15_free_download_64_bit_crack_and_keygen.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/how_to_make_beef_jerky_in_oster_dehydrator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86a41032-cd8b-4743-987c-2cf1b212e7ef/89177145016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605b118b-1467-4e90-8b5a-74cb1b5667ba/navy_blue_shirt_dress_womens.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/algebra_2_glencoe_mcgraw_hill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c429fe03-1824-43ba-a8ec-03fe0e75647a/migimotewajeri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abbc2456-98fe-4c6b-b46b-21fd9cf7c860/what_is_composite_function.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79fce1ed-1544-43a9-a55e-c024c20cc138/zimigilosiz.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_off0000fd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD07 5616 bytes
SHA-256: b08a9e323df803a4b4d10136a236d35f5ddfca7dfb776a1707efe9187b0274e0
font_01_sfnt_off00010ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF5 11112 bytes
SHA-256: 6e4595008db8018df8dd002dee28f7c577ab8e7c3ccbeedc27371aace756ec48

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