Malicious PDF — malware analysis report

Static analysis result for SHA-256 97eb5fcf07646bb1…

MALICIOUS

PDF

69.0 KB Created: 2021-06-13 00:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 28c9bfe1b0dfd369cc9fc21139f98283 SHA-1: c2e63285ba4932608f5d7e22a099e07b66152d34 SHA-256: 97eb5fcf07646bb18fae6d13fe65fa99e56781ba30c2ddb06cd49d7c4fc0c048
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 0.9996

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://infrive.ru/pbw?utm_term=hungry+shark+apk+cheat PDF link annotation
    • https://nubizuvilokimid.weebly.com/uploads/1/3/5/4/135401099/bojolomewusesu-levenikufe.pdfIn PDF document text
    • https://runevivapubate.weebly.com/uploads/1/3/4/5/134595370/pavurufu.pdfIn PDF document text
    • https://merudaxesu.weebly.com/uploads/1/3/1/3/131383629/jarexukezeta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449616/normal_5ffcbb0eb4174.pdfIn PDF document text
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/8f15ce1.pdfIn PDF document text
    • https://bomirilipaxotez.weebly.com/uploads/1/3/4/0/134096722/rafapepop-xudiji-dofiz.pdfIn PDF document text
    • https://naduvita.weebly.com/uploads/1/3/5/9/135973463/kagit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_6002a6f07c51e.pdfIn PDF document text
    • https://nasorigabewa.weebly.com/uploads/1/3/4/5/134519214/vovilaparasilop_dazot.pdfIn PDF document text
    • https://sitasujo.weebly.com/uploads/1/3/4/8/134876827/7278738.pdfIn PDF document text
    • https://nowitijot.weebly.com/uploads/1/3/4/7/134716658/kuwimorusurofuzesana.pdfIn PDF document text
    • https://zukinubugepar.weebly.com/uploads/1/3/4/5/134514864/157676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458837/normal_604e854a1c8f5.pdfIn PDF document text
    • https://bipusisep.weebly.com/uploads/1/3/0/7/130775903/kibolizanezulege.pdfIn PDF document text
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/vibupabogubow_sovorivuwamediw.pdfIn PDF document text
    • https://losulojer.weebly.com/uploads/1/3/0/7/130739206/3054241.pdfIn PDF document text
    • https://juposuwidamad.weebly.com/uploads/1/3/1/4/131406248/tibipi-kilefoxisul-pubasiti-temarezuwopek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_6024adb434ee0.pdfIn PDF document text
    • https://ruxakidefo.weebly.com/uploads/1/3/4/1/134131713/7272cdb3b659.pdfIn PDF document text
    • https://guvoruba.weebly.com/uploads/1/3/4/7/134742814/tavolutodulin-wonivafisob.pdfIn PDF document text
    • https://sukesiguwote.weebly.com/uploads/1/3/4/1/134132294/raxurutara-xesop.pdfIn PDF document text
    • https://zufezegudowoz.weebly.com/uploads/1/3/2/6/132683286/3784fa596b2f1fc.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_off0000d36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36B 5288 bytes
SHA-256: ef5ecae102000a6eb2e00f6defdac62b4d74e9130ae77bcf2a860971d80303bc
font_01_sfnt_off0000e56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56F 9976 bytes
SHA-256: 1ff3d7d1ea895c6b5e953f7acbcd686d5e78316d1d14e3322581aa3b59ebf8af

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