Malicious PDF — malware analysis report

Static analysis result for SHA-256 edde83f0d8a1cea3…

MALICIOUS

PDF

79.1 KB Created: 2021-02-14 02:15:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6625c47bd77e3ded872aaed076d168f7 SHA-1: 6071e54f737969dd00c851459f0368277ded9c18 SHA-256: edde83f0d8a1cea3a8544665fdb9a668a85e8851d1a303a248eee4dcc8f117b7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting services, characteristic of a link farm designed to distribute phishing content or malware. The embedded URLs suggest an attempt to redirect users to malicious sites.

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://seumenha.ru/123?utm_term=1913+liberty+head+nickel+fake PDF link annotation
    • https://vaxofawaz.weebly.com/uploads/1/3/2/6/132682661/6429683e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_601d3edb90884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464311/normal_5feaf2ba30333.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480155/normal_5fef99cf36b30.pdfIn PDF document text
    • https://rebafanivine.weebly.com/uploads/1/3/6/0/136054257/janabekogeker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375885/normal_5ffb6aa6422ec.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/80iejfP/learn_chinese_free_online_mandarin_audio_courses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485016/normal_6010919c75662.pdfIn PDF document text
    • https://cdn.sqhk.co/medasozuf/fjhjV3G/95299184120.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454286/normal_5fed99683b477.pdfIn PDF document text
    • https://jowatewiko.weebly.com/uploads/1/3/1/3/131380225/4105039.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427282/normal_5fec05f8bac3e.pdfIn PDF document text
    • https://taxurazuzar.weebly.com/uploads/1/3/4/0/134042721/7a6928.pdfIn PDF document text
    • https://wufodiwefoveve.weebly.com/uploads/1/3/4/8/134891768/vixewiwupodarekepax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5fe7b28de47a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_601e218f163b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/jazinidixobadeno.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/duplo_5000_booklet_maker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/warrior_crafting_guide_hearthstone.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/15012920560.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_off0000f5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E0 5516 bytes
SHA-256: 1aa5667368c66b8d9c2c24dd2b899dc22c1c33de576164beb055e3b20279b5b8
font_01_sfnt_off000108a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A0 10928 bytes
SHA-256: 9c42df99874629118fa307619d68b88202fe2a8f5b02677f3d4b0f49276f9d49

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