Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab9905a43ded56e…

MALICIOUS

PDF

74.1 KB Created: 2021-04-05 17:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 254d459796305166a9763d244b3d57ec SHA-1: 5a9093d979cb15eeea2a5cf942e0b5419b71c261 SHA-256: fab9905a43ded56e77d062407368d1a6a2276acae05ccd7fdc596fa8e2326601
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 0.9996

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
  • 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://jottigo.ru/strik?utm_term=el+general+naranjo+temporada+3+descargar PDF link annotation
    • https://cdn.sqhk.co/fafujedajir/q58n9ge/mikutagokiwakazixuxav.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/92591844894.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/gfVgeid/flexeril_pill_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481990/normal_5fc83eb3d3c04.pdfIn PDF document text
    • https://xiwajuropoji.weebly.com/uploads/1/3/4/3/134371127/kewufijaniguxewa.pdfIn PDF document text
    • https://cdn.sqhk.co/wofosavafiju/HsEy7gc/dell_alienware_area_51m_r3.pdfIn PDF document text
    • http://futubog.22web.org/97389249912.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379485/normal_6004b37c0e4da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492573/normal_5ff70a642e9cc.pdfIn PDF document text
    • https://womepibenim.weebly.com/uploads/1/3/4/0/134040947/5b05f958d15adc2.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/wazorixekunafob/android_5._1_1_zip.pdfIn PDF document text
    • http://pejibuturu.epizy.com/22981273621.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/how_to_structure_a_novel_chapter.pdfIn PDF document text
    • http://fewuzefar.rf.gd/wijelofumijumezute.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/59795878037.pdfIn PDF document text
    • http://wuvodubox.epizy.com/54835030959.pdfIn PDF document text
    • http://todidetiped.onlinewebshop.net/riesgo_cardiovascular_aha.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/bosch_tassimo_instructions_manual.pdfIn PDF document text
    • http://livirava.atwebpages.com/vexeminudatubikeda.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/autocad_civil_3d_2010_software_free_download.pdfIn PDF document text
    • http://vopizezo.epizy.com/53708157009.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_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 5588 bytes
SHA-256: 3af64836a9fb8fd31e00f7879b6e0383c19f3527382b7567746d740031705e93
font_01_sfnt_off0000f3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A8 11584 bytes
SHA-256: 7e8f4caef1eef46b6918b8942073204f4e641a37f69f3e450c3a564a3bddd420

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