Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b2417c5bb385b7…

MALICIOUS

PDF

78.6 KB Created: 2021-03-08 12:48:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 27a45d2bc5bc30e29b721265efe3eea9 SHA-1: 5838d21ae380b8588fe3e30656e017f181852abb SHA-256: e1b2417c5bb385b79761cac72ab18cac8d17f0e4b8bd7d7def4e06b341eca287
186 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=eso+is+jewelry+crafting+worth+it PDF link annotation
    • https://jumifusat.weebly.com/uploads/1/3/4/6/134629025/5993608.pdfIn PDF document text
    • https://wazolupagod.weebly.com/uploads/1/3/0/7/130775763/a104f9ab2c508f.pdfIn PDF document text
    • https://kixaxadamakike.weebly.com/uploads/1/3/0/7/130775249/1e720d1ffd95e4.pdfIn PDF document text
    • http://natezaka.iblogger.org/essay_report_format_spm.pdfIn PDF document text
    • https://tilemutafadat.weebly.com/uploads/1/3/1/8/131856023/985024bf.pdfIn PDF document text
    • https://davugewozo.weebly.com/uploads/1/3/1/4/131408984/4143510.pdfIn PDF document text
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/gawanogemavegez.pdfIn PDF document text
    • http://sunazeremitiwu.mypressonline.com/wudepenodegeg.pdfIn PDF document text
    • https://mitusifizipera.weebly.com/uploads/1/3/5/3/135300422/2c6d6bc7.pdfIn PDF document text
    • https://sujujawajiz.weebly.com/uploads/1/3/5/9/135964945/6426677.pdfIn PDF document text
    • https://guxiwuwo.weebly.com/uploads/1/3/1/0/131070036/zujuwupax.pdfIn PDF document text
    • https://woxogobigevi.weebly.com/uploads/1/3/0/8/130814596/nipuguvuso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://webidiwotew.epizy.com/bubble_shooter_excel_sheet_game_free.pdfIn PDF document text
    • http://jubogaju.atwebpages.com/76893369216.pdfIn PDF document text
    • http://siropoti.rf.gd/85015585414.pdfIn PDF document text
    • http://galexuduxegi.epizy.com/juzenazukosolukagor.pdfIn PDF document text
    • http://sanugifop.atwebpages.com/jogerowej.pdfIn PDF document text
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_18968885b35b42c98db8e85c00bb7522.pdf?index=trueIn PDF document text
    • http://soranodabiwegi.myartsonline.com/nikon_p_223_3-9x40_matte_bdc_600.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_b47b0bb026324bc78a41d3f3296504d0.pdf?index=trueIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_7a5183a645064d4eb2f02c730923b1b2.pdf?index=trueIn PDF document text
    • http://nubejapowij.epizy.com/english_german_dictionary_free_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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C0 5368 bytes
SHA-256: fea4cf4ae7663bd1efaa34c04af2bebe3a0c2463e3d044826094763e98936cf8
font_01_sfnt_off0001091f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091F 10472 bytes
SHA-256: 61ba2a3e6262d74412df93f5bdf3ea2deec217fbc80a11efcec508ee9d4c99e2

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