Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a97084e951dea2e…

MALICIOUS

PDF

80.0 KB Created: 2021-03-21 00:20:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8d4cf53c112cb59dc6914e062820c783 SHA-1: 91c11588c97d43f9e37d2fd93f89cd71aaca7621 SHA-256: 7a97084e951dea2e2ecf5b7c766e9c9d477547a978a100965767445ee7a7a875
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 0.9983

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://xezojetit.ru/wix?keyword=ocean+of+apk+fnaf+2 PDF link annotation
    • https://tonikajolokoge.weebly.com/uploads/1/3/0/8/130874266/fexadiko.pdfIn PDF document text
    • http://pro-gram.pro/28787748393amft2.pdfIn PDF document text
    • http://kuxni.su/cant_connect_harmony_hub_to_wifi9adt9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410016/normal_5ff7a9ff36ad6.pdfIn PDF document text
    • https://rexajubimazon.weebly.com/uploads/1/3/4/8/134884463/2145364.pdfIn PDF document text
    • https://sazopugewado.weebly.com/uploads/1/3/1/4/131453094/wumukel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_60255e04b7816.pdfIn PDF document text
    • https://vinawulisakuj.weebly.com/uploads/1/3/2/7/132712505/57040634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445558/normal_5fd171766d6c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485813/normal_5fd675abd9ab6.pdfIn PDF document text
    • https://faremuxonebaw.weebly.com/uploads/1/3/4/5/134598019/5532151.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/75190af.pdfIn PDF document text
    • http://tokio-2020.fun/wuzazotesosupijodidup0vw.pdfIn PDF document text
    • https://polidixixav.weebly.com/uploads/1/3/4/4/134467230/2091541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_60494da881851.pdfIn PDF document text
    • http://changepass.online/is_richard_lustig_still_alivegww75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_5fdbaf05af491.pdfIn PDF document text
    • http://mp4.design/bugatti_hd_wallpapers_1080pi7k35.pdfIn PDF document text
    • http://hookup753.fun/bixataboxefopinur6akl2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_600c494788502.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/lulugokoxu-ruberetip-butikavaf.pdfIn PDF document text
    • http://online-bestshop.xyz/82952374674mlxxo.pdfIn PDF document text
    • http://1green.space/b._ed_exam_form_2018rhi2f.pdfIn PDF document text
    • https://betivina.weebly.com/uploads/1/3/0/7/130774994/326ce0e64e1.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
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 4588 bytes
SHA-256: 34e6ec927e93f8317e6a9bf10c965933d88f4b9a13e413e80acce7499adbfe31
font_01_sfnt_off0000f1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E7 3024 bytes
SHA-256: cf5ed4f450e5fc1fa31c8ac31b5dbd05637a4ba05cdfa332ae769b600578e534
font_02_sfnt_off0000fd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD15 11452 bytes
SHA-256: bc6f36f091c39058cd4b6d2c8e99fecaa9595da746a96ec52807baacda029f25
font_03_sfnt_off00012409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12409 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333