Malicious PDF — malware analysis report

Static analysis result for SHA-256 842617c66a16f932…

MALICIOUS

PDF

72.6 KB Created: 2021-03-09 11:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1a3caca9177be8edb5b0d06eb9519260 SHA-1: 309a086b42600ed3f52da48462c75a0949e3fa18 SHA-256: 842617c66a16f932a3474611262dfd3a900dd22f5a5c97814eda05cf041b09bc
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 0.9995

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://seumenha.ru/wix?keyword=cell+organelle+crossword+puzzle+answer+key+biology PDF link annotation
    • http://lngcliente.com/mafawupojotiva6serj.pdfIn PDF document text
    • https://bupedokan.weebly.com/uploads/1/3/1/6/131607930/pozuvusagivinas-nosulimikiwize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427091/normal_5fe73ac486ae7.pdfIn PDF document text
    • http://topsol.xyz/550017521169pcyu.pdfIn PDF document text
    • http://tovovaledujori.22web.org/sacred_geometry_symbols_and_meanings.pdfIn PDF document text
    • https://lexugorubu.weebly.com/uploads/1/3/0/7/130776619/6763864.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/7003776.pdfIn PDF document text
    • https://jijaxiwiruba.weebly.com/uploads/1/3/5/3/135333012/7690076.pdfIn PDF document text
    • https://dewosuto.weebly.com/uploads/1/3/1/4/131453399/0b6ada5deb83b42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_6019bab97233e.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/blacks_law_dictionary_definition_of_justice.pdfIn PDF document text
    • https://dobivevoxopu.weebly.com/uploads/1/3/1/4/131453544/7309660.pdfIn PDF document text
    • http://melowimaz.getenjoyment.net/how_to_spot_a_double_dapple_dachshund.pdfIn PDF document text
    • http://svoytrylend.xyz/fukusinajupepikitotmjp5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456984/normal_5ff7b0f24db60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481667/normal_5fecc6b110516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486997/normal_603585d0ebf74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mubozezubudiz.rf.gd/givezeloselotax.pdfIn PDF document text
    • http://lasiliroba.epizy.com/as_a_man_thinketh_book_in_hindi_download.pdfIn PDF document text
    • http://figedid.rf.gd/uc_browser_mini_versi_lama_apk.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/boxifitiduseno.pdfIn PDF document text
    • http://fevufubot.rf.gd/49284021158.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_off0000ded1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 5596 bytes
SHA-256: 42442150b6f4d85831fca8034787c4cc3ea394a05d63696620a2fa69d9686697
font_01_sfnt_off0000f200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF200 10072 bytes
SHA-256: be417d4c478a16241d2b3092d594d4856ae4fbe92632ac691af842d9be3c9675

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