Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b78fb962d070839…

MALICIOUS

PDF

98.5 KB Created: 2021-05-27 08:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0ce72f8e91e8d1e8476676edbddc67fa SHA-1: d2946851b93e87eaf767b16000d63ae064d0b0af SHA-256: 6b78fb962d070839937eafb0ec7199ee6c7866a925e3acfebd1e42ee72a5ae00
246 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The 'SE_SECRET_RECOVERY_LURE' heuristic indicates the document may also attempt to trick users into revealing sensitive information like recovery phrases or private keys. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://jottigo.ru/strik?utm_term=clicker+heroes+import+codes+2021 PDF link annotation
    • https://lapenemelibi.weebly.com/uploads/1/3/4/7/134708636/7870813.pdfIn PDF document text
    • https://kunobile.weebly.com/uploads/1/3/4/5/134517695/kewoxubatif.pdfIn PDF document text
    • https://rogifegupoxixo.weebly.com/uploads/1/3/4/0/134040774/73c95c7a8ebf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_602e001c4551e.pdfIn PDF document text
    • https://xijoxipuxob.weebly.com/uploads/1/3/4/7/134704834/4925225.pdfIn PDF document text
    • https://buzubexod.weebly.com/uploads/1/3/4/0/134017192/3883615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425238/normal_602ce20fe1032.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372719/normal_5ff553155336f.pdfIn PDF document text
    • https://bavazaje.weebly.com/uploads/1/3/4/3/134335981/2794789.pdfIn PDF document text
    • https://livugazenexaru.weebly.com/uploads/1/3/1/6/131607095/2804700.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://uploads.strikinglycdn.com/files/0c4180fd-332e-48e1-8816-fd49e5e68af5/43382218935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc46e601-efb5-4969-a2df-10a65fadfdc7/spider-man_1990_comics_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16477af7-1b75-4e62-bafb-bf6277fd8274/66666591287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8599afa1-6ce1-4491-8046-fe613857d791/8007736314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229f64a6-f45d-41b1-8a5d-bcf691619aa0/lusutuzuzejowilaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f9a619-6ba9-442a-a5f8-94bf071c3dfd/do_you_wear_prayer_beads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02415e15-f6c1-40df-9104-422d2944428e/how_to_clean_cuisinart_single_serve_coffee_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8104fd52-528e-487d-be94-b312e951faae/house_upon_the_hill_lyrics_miss_montreal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac847f25-4f4b-4680-9517-b9097106db81/95394793111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28aa93ef-a812-461e-a7e2-bac771cb8983/tissot_t-touch_expert_solar_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaad5f83-b434-47d6-a419-884ea6ff3f92/how_to_activate_the_anointing_of_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f238c5-24b3-46b4-8e8f-089c7254dc4d/zuxeranakegedegopigedituk.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAD 2828 bytes
SHA-256: 2f32373152b86590eb5c993bf8dbb57d20fc33770b92bc1ec6b5fd985d660553
font_01_sfnt_off000135b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B6 5196 bytes
SHA-256: eaa68c6b089a919734f919dd1c3d7b63bcded6eb80cc59e007660c203ce78e80
font_02_sfnt_off00014761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14761 11376 bytes
SHA-256: 90e84ee3bf145b44d9caf8b2c8aed877632d6510c20d3dee08e92444f0ef864b
font_03_sfnt_off00016e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E1E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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