Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ad48204553ba44…

MALICIOUS

PDF

74.1 KB Created: 2021-03-14 23:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0daf5fec100708b8f2096932f83593ff SHA-1: 25d45f8d8d4c0a607672a939732d1f8031c8a1e1 SHA-256: f2ad48204553ba44a42f5ae58d345425c52227c708038b2f32ccde0bf1d413e8
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to deliver second-stage payloads or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nipisod.ru/strik?utm_term=capitalization+and+punctuation+practice+4th+grade PDF link annotation
    • http://urolog.xyz/business_analyst_masters_salaryih0im.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/6683957.pdfIn PDF document text
    • https://wafulerafi.weebly.com/uploads/1/3/4/5/134503758/8523298.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393041/normal_5fcd5a86b508e.pdfIn PDF document text
    • https://ruxapumuful.weebly.com/uploads/1/3/4/6/134682584/kowipikaj.pdfIn PDF document text
    • https://pezibife.weebly.com/uploads/1/3/4/3/134376528/838923.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413370/normal_5fc8144e0c340.pdfIn PDF document text
    • https://cdn.sqhk.co/rifebonapesi/5s8ggje/simcity_buildit_hack_tool.pdfIn PDF document text
    • http://rcasino.info/27132777743opecl.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/Khedqja/best_nail_biting_treatment_for_toddlers.pdfIn PDF document text
    • https://gezivotad.weebly.com/uploads/1/3/5/9/135963035/361af9.pdfIn PDF document text
    • http://cybety.xyz/491738248u8cfg.pdfIn PDF document text
    • https://cdn.sqhk.co/dusujukakal/jcNggIr/rifujoxogafolawamoru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485943/normal_6004c0b386240.pdfIn PDF document text
    • http://detonic-italia.website/8884051227326g0l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_6011cb0caa0ea.pdfIn PDF document text
    • https://panonalosisewe.weebly.com/uploads/1/3/5/3/135316392/lolewurogomol-funonata-boxugedogazoli-ruwasawifinem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5fe92a1539877.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/ruwav-tufidazowituw-basedipuzinaz-kilafosarok.pdfIn PDF document text
    • https://fijitedutim.weebly.com/uploads/1/3/1/1/131164269/zesugaxav-lazasilozuwa-dorigolafako-bibegejiwofur.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://suzufesa.epizy.com/acls_guidelines_2018_ppt.pdfIn PDF document text
    • http://wafowexo.epizy.com/54110981936.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD753 5200 bytes
SHA-256: 12c02f6a9e3f35d0ca049d7946d02672b56b3417be0f8fdfcd7b8af93bab5d98
font_01_sfnt_off0000e902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE902 10368 bytes
SHA-256: d1e72fb376916bde4eff460562ea7a8194d39af34a8d4c738a1dba06d6c4f16a
font_02_sfnt_off00010c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2