Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d8c7a993d47e11…

MALICIOUS

PDF

107.7 KB Created: 2021-04-08 03:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 18101008c144cf07158d3d08ff75173d SHA-1: b25b57a3b84b8e54d8c7c00b28b09f55284a07d2 SHA-256: 30d8c7a993d47e1198f17287ca4cd4d169a1b51334010080d7dcd384ee3d4bc1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=mgm+dvd+logo+2003 PDF link annotation
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/699edd1d6ba.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/hdpJwhg/android_messages_update_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/2iibjf6/1215029078.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/fqghjhj/.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/bisinufojupisa.pdfIn PDF document text
    • https://sutesesa.weebly.com/uploads/1/3/4/8/134871168/mopabulinurape.pdfIn PDF document text
    • https://jegagevo.weebly.com/uploads/1/3/4/1/134109204/xojigawep-vataw-zepexevidotibeg.pdfIn PDF document text
    • https://junerokiwoji.weebly.com/uploads/1/3/0/7/130775834/gurasozarixodim.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/2uijjej/like_a_boss_meaning_in_arabic.pdfIn PDF document text
    • http://metagopu.22web.org/70902350702.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/iyEqTjb/21080775931.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/1ccaa6ac-4f2d-4a7a-96d6-903126196f88/zelosavupadujuwivisetezok.pdfIn PDF document text
    • http://memorakubot.epizy.com/inverse_of_a_2x2_matrix_worksheet.pdfIn PDF document text
    • http://kotidaw.epizy.com/amnesty_activism_guide.pdfIn PDF document text
    • http://woxebolinos.rf.gd/obligationenrecht_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f2ff610-ed47-43cb-9e2a-3bec7f6d0a26/latest_celebrity_news_gossip__photos_tv__showbiz_daily_mail_online.pdfIn PDF document text
    • http://buwijakuwomem.rf.gd/acrylic_acid_msds.pdfIn PDF document text
    • http://xujogefup.rf.gd/annamayya_audio_songs_telugu_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A8F 5164 bytes
SHA-256: 35534fe96c6bdcf4877139792e899e8eecf8ff1c3ef6603d0e13e27c3ad4f6b1
font_01_sfnt_off00015c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C27 1728 bytes
SHA-256: 790f67d3ad82eeaf93483834bec56c3fa41f4a2349ce06a329f7aef0e21f3ec8
font_02_sfnt_off000164c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164C8 11460 bytes
SHA-256: b8f48f73922cecef7e6e68bbc511664dbf645e620662d1e2b5c2d1f9a28461a4
font_03_sfnt_off00018bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BCF 16164 bytes
SHA-256: 93c4960823725ef94d8ec03793b19c4b1345bf2e5d761cd61be4ca59296c2739

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