Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ac77cbbcf1eac7…

MALICIOUS

PDF

76.7 KB Created: 2021-03-20 13:19:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bf0f5b4ca001fc260ea87629c2390c4a SHA-1: 726fdcbaa73a67e75120972143c26e0f3a7835ff SHA-256: 00ac77cbbcf1eac75bc62067b9e23e6405918a73cfe1263cef507db7a7b4f31f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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://lozipotod.ru/wix?keyword=orphan+train+rider+pdf PDF link annotation
    • https://bebadivinokad.weebly.com/uploads/1/3/4/6/134604253/fae426e46e7dc3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366630/normal_5ff717b1bfbbe.pdfIn PDF document text
    • https://jeduwenerapowi.weebly.com/uploads/1/3/4/6/134678879/43948d80a61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490757/normal_602dd6f33fe5f.pdfIn PDF document text
    • http://buputenajonix.mywebcommunity.org/acordes_de_guitarra_rock.pdfIn PDF document text
    • https://nibowivuxewanu.weebly.com/uploads/1/3/1/3/131379040/427ea3ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445106/normal_6042d96d1886c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447278/normal_5fd7c6cde724b.pdfIn PDF document text
    • https://simokatojerosu.weebly.com/uploads/1/3/0/8/130874490/bonefeja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478430/normal_5fe3a8355517d.pdfIn PDF document text
    • https://lojavexir.weebly.com/uploads/1/3/5/9/135963097/relukikirotepak.pdfIn PDF document text
    • https://gazevasodixobex.weebly.com/uploads/1/3/4/4/134437076/tadadagaf-tamonovotog-minatepog-nusudaxomar.pdfIn PDF document text
    • https://nozabuzewetuk.weebly.com/uploads/1/3/2/6/132683147/resigogonitipof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450628/normal_5fff778c7e8a4.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/nesogakafumuvinaresakevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494160/normal_6029dcd549659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_60368fcedd363.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/nenapawapututizijevuzokef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414679/normal_5fecee339821a.pdfIn PDF document text
    • https://tagopebarezixog.weebly.com/uploads/1/3/1/6/131607889/fidugigadanadegogul.pdfIn PDF document text
    • https://fenatinuzari.weebly.com/uploads/1/3/5/3/135314561/53fb98026128.pdfIn PDF document text
    • https://kegegofelev.weebly.com/uploads/1/3/2/6/132681159/gupenul_jadizarofuwibo_rowapusejumedut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ebed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 4948 bytes
SHA-256: e80afac91d38ff5dbd29554633c9c58292b529efb46f3f3f03da307df9cf3078
font_01_sfnt_off0000fcbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBB 11528 bytes
SHA-256: 22f34b49b53b3c7534b0dd423267afb8a87004a3d1fdf0fc57519f5f606440be

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