Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a666b34b600131a…

MALICIOUS

PDF

89.8 KB Created: 2020-10-30 08:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cd6116d74537418b0a876b1b54f6aa2b SHA-1: 6588f07d8024c89cd2e37ea0f491e0e3ab76e438 SHA-256: 6a666b34b600131a8df499810bc7db78256ec3dd9d5418ee9ba7d17a64bbc1d3
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/pify?keyword=assassin%2527s+creed+3+connor+father In PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/154e3b45d9.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/xupedulig-dokefe-tulozakopodi-nisixupafof.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/mofubemibon-gezisebujebigin-puzami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_5f92ca298ed37.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/wavunot/voltaire_candide_ou_l_optimisme.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/xunita.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/yo_autoestima_y_autoconcepto.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/fexad.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/67015695182.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/sony_magnescale_lm10_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/dazixitewola.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/kavek.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/84220189255.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/attendance_certificate_format.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/abrasive_jet_machining_download.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_off00010263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10263 2960 bytes
SHA-256: 3c6502e04658d985b37ed967139d4b1bb7136c1c8ff06868e6b64c17630b7d50
font_01_sfnt_off00010ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE6 5264 bytes
SHA-256: 894f5c0ddcc2f5eca2d9b73744f2c0f4619da80e618bd8ef3cab6c0532aefb8a
font_02_sfnt_off00011ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECD 10360 bytes
SHA-256: 3ecb8ae7ed7a8ef3d780245cfa695ffd829c9ee27d0c5f144b71bdde10d42092
font_03_sfnt_off0001425b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1425B 16596 bytes
SHA-256: 3ba429462c40bee38bcbb55c3ca01557441df048abb6e00eb17af0bf92564d4d

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