Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ff1a83581ff2f1…

MALICIOUS

PDF

74.0 KB Created: 2021-03-20 16:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 04024b429cc49c596ffe25faf6fe2ad3 SHA-1: 15c55b7b31fdb09c63cbb3ea3a0d31ce1a2eedd1 SHA-256: e7ff1a83581ff2f19916080d62a0077c24e02e2b2640511773d494aad61cbefd
156 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 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
  • 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.
  • 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://soxebez.ru/strik?utm_term=how+to+set+up+a+ge+universal+remote+to+a+tcl+roku+tv PDF link annotation
    • https://tiwoboromezusud.weebly.com/uploads/1/3/0/8/130874009/5270223.pdfIn PDF document text
    • https://tedifonag.weebly.com/uploads/1/3/1/1/131164063/wuzedazekikoka.pdfIn PDF document text
    • http://nijaxubazaziw.mypressonline.com/65273032969.pdfIn PDF document text
    • https://fewanisip.weebly.com/uploads/1/3/2/7/132712603/xajok.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/cd7eb58c140207.pdfIn PDF document text
    • https://xediziku.weebly.com/uploads/1/3/1/3/131384396/nalade.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/98075731490.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/79532658209.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giworutiw.myartsonline.com/12738721873.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/56755999749.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/84402467606.pdfIn PDF document text
    • http://jomupaz.myartsonline.com/20368813366.pdfIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_73d3a32b31674e10a716fc2f1f6b80f0.pdf?index=trueIn PDF document text
    • https://48e6b720-b653-4920-beb0-7ef171ab6ab9.filesusr.com/ugd/d9d1f5_a7ec75e4369746f5991bd2b9df52ed8d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jusagi/45723491035.pdfIn PDF document text
    • https://a181bb3e-7445-4f1f-a1cf-b2fe66c13e92.filesusr.com/ugd/91ce54_96448b3128d849f596f5f940fef6d5a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/how_to_setup_amazon_fire_hd_10.pdfIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_f2567da63cec4ff1b20d581ff7efdb5a.pdf?index=trueIn PDF document text
    • http://ginowane.onlinewebshop.net/68943490458.pdfIn PDF document text
    • http://vumovofun.onlinewebshop.net/journal_article_format_example.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_off0000e3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F5 5428 bytes
SHA-256: 0816d4da39cf44a364fcb89f9c750ba260644376d1512510537d74b942cdf3f4
font_01_sfnt_off0000f677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF677 10276 bytes
SHA-256: d9dcc471e330246c6c599301451cc5ae398c4bcb4d8c0145890262a863e84c62

Open this report in the interactive analyzer, or submit your own file for analysis.