Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1430947c7f53ad6…

MALICIOUS

PDF

64.5 KB Created: 2021-01-13 17:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3ecbf5ff5e894b54eec7ee63438c463a SHA-1: 9c78745b4b658eb8ed2b3b62c83d2521236db956 SHA-256: e1430947c7f53ad6ce5d980ee4cdc6ae7a378db8cfae011b04eccf0d1916a929
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 identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, characteristic of a link farm used for phishing or distributing further 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://traffset.ru/aws?utm_term=php+quraner+alo+song PDF link annotation
    • https://site-1188059.mozfiles.com/files/1188059/melekaberivaxazufud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f9a2166006ff.pdfIn PDF document text
    • https://site-1174390.mozfiles.com/files/1174390/social_detective_app_bundle.pdfIn PDF document text
    • https://mabexerezigija.weebly.com/uploads/1/3/5/3/135324341/641654.pdfIn PDF document text
    • https://site-1222430.mozfiles.com/files/1222430/rope_puzzle_seattle_day_2.pdfIn PDF document text
    • https://site-1221861.mozfiles.com/files/1221861/calculus_10th_edition_anton_answers.pdfIn PDF document text
    • https://biresunidulili.weebly.com/uploads/1/3/1/8/131856549/54221424d.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/guperaxolaf.pdfIn PDF document text
    • https://moxuranib.weebly.com/uploads/1/3/4/3/134345095/7283278.pdfIn PDF document text
    • https://site-1168337.mozfiles.com/files/1168337/formula_one_accident_2019.pdfIn PDF document text
    • https://disavapiviloma.weebly.com/uploads/1/3/4/3/134351159/reviwun_fakosuvi_pefono.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/4242220.pdfIn PDF document text
    • https://neluposu.weebly.com/uploads/1/3/4/3/134369170/repozuwijolatu-jibedefala-jaraxulavejasut.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_off0000c328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC328 5208 bytes
SHA-256: b3b13c4a065d22994d488f9fc9eeb84fb11897872a1b3fa638e61e1beda477d7
font_01_sfnt_off0000d4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D7 9796 bytes
SHA-256: 895caeca57d43319b9ef6f203ef3df30deedf56bbd5f616c12203adfd9676a7a

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