Malicious PDF — malware analysis report

Static analysis result for SHA-256 7101e4d8a7be254c…

MALICIOUS

PDF

78.3 KB Created: 2021-01-16 10:58:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6c8c30a5631e7a583bd84a1029b6e2a8 SHA-1: daea3179b505f5614c9dd368a590eafd7dff14e2 SHA-256: 7101e4d8a7be254c133654ee424b03f36257211cf7ca8fde15ff3bf9f50c19f5
214 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 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 0.9996

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
  • 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://traffmen.ru/123?utm_term=ffxiv+hunting+log+conjurer In PDF document text
    • https://static.s123-cdn-static.com/uploads/4419857/normal_5fcf604321b13.pdfIn PDF document text
    • https://site-1175914.mozfiles.com/files/1175914/virtual_haircut_3d_sound_mp3_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381988/normal_5ff89d1d21edb.pdfIn PDF document text
    • https://jajufuwupu.weebly.com/uploads/1/3/1/1/131163717/2768223.pdfIn PDF document text
    • https://zulufiki.weebly.com/uploads/1/3/4/6/134662959/wudeliduk_busifirusipanu_nixese_nubeto.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/97103f78e4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vebisop/lowokuwofusoz.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/alpha_headline_bold_font.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/tekimusopiwisus.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/10936129248.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/create_s3_bucket_with_kms_key_terraform.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/bevozasom.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/42913228114.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/algebraic_identities_with_proof.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/sadodowasikufu.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_off0000cff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF5 4796 bytes
SHA-256: 07375ba39c0914d3b8639e1db45c0140ac2afae96d2b0847f722bb4a7e1ca17a
font_01_sfnt_off0000e04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04F 12232 bytes
SHA-256: d10a84b2d29daedfaab35871c308b89e16ac8acb685bfa2bfbcf83555fb727ad
font_02_sfnt_off000107c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C8 16084 bytes
SHA-256: b2e8c06b1ad5f35c7047dbd531a334cc1851c91c3c2005c719b94525b4bd4978
font_03_sfnt_off00011c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C75 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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