Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be04a2a07433124…

MALICIOUS

PDF

78.7 KB Created: 2021-03-18 23:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 27db7f33c98800b91bd9ffc3d3e84024 SHA-1: 7c340638a76ccffb9f32d3e1a29a41512647f0f8 SHA-256: 9be04a2a07433124af0739cdad9f963a029793cce05cac24eb1b424d3b0787df
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external links, many pointing to disposable hosting. One such link is https://xajibur.ru/wix?keyword=persona+4+golden+magician+social+link, which likely leads to a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wix?keyword=persona+4+golden+magician+social+link PDF link annotation
    • http://regvoolkim.website/69985682822yvajr.pdfIn PDF document text
    • http://chambre.xyz/kilisegenepogolatamazisumbeko8.pdfIn PDF document text
    • https://wavoxodasamemat.weebly.com/uploads/1/3/5/3/135348105/fc18a127.pdfIn PDF document text
    • https://cdn.sqhk.co/kidimezamos/hijdhbN/61449031966.pdfIn PDF document text
    • http://jobauthor.online/install_android_x86_dual_boot_linuxjth1a.pdfIn PDF document text
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/nitatofuvi-vobafagov-pufujepoj-tidawud.pdfIn PDF document text
    • https://filukekab.weebly.com/uploads/1/3/4/4/134478490/6689668.pdfIn PDF document text
    • http://swiss-gear.store/amazon_gold_box_deals_canadadi9ko.pdfIn PDF document text
    • https://jenajurowob.weebly.com/uploads/1/3/1/4/131408252/361538.pdfIn PDF document text
    • https://sibolapitabake.weebly.com/uploads/1/3/4/4/134469628/mulopigosuloda_sikumetevekimut.pdfIn PDF document text
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/kulesit.pdfIn PDF document text
    • http://50offshop.info/fodatipojinepewimebozezamt52t.pdfIn PDF document text
    • https://sojekaga.weebly.com/uploads/1/3/1/0/131070529/2616877.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/d1uhdgl/58153929615.pdfIn PDF document text
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/duxigekij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_2e171b79d391480f805384dd8567062f.pdf?index=trueIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_e8dc69a47a934c6493ab745347399dc1.pdf?index=trueIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_04c1d6d939f846b7851081f65b541aae.pdf?index=trueIn PDF document text
    • https://bd15da75-ee01-4ad3-8b22-4778d9929f37.filesusr.com/ugd/1abc29_aa304e256c234e70b5c1e6148dee8a76.pdf?index=trueIn PDF document text
    • https://620678a0-8f5b-407b-881a-8a96a128c1c4.filesusr.com/ugd/25b7a6_dc7f332552074e489ec651965f0b2bef.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFF 5412 bytes
SHA-256: 204663a06e6c1b961e36e487d5fccfb2339528d7fd04a23e41909cd9f76ba139
font_01_sfnt_off0000f259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 10720 bytes
SHA-256: 69513535fa59daf6fdfc10d475bc82ded1ee1a868e3f7ddd50c8f014295c0623
font_02_sfnt_off00011729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11729 16348 bytes
SHA-256: 94b9ece9e75b6087aa34b6aeb73ff9aa73d21cfbdb0266ef6d0d36cca08943d8