Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e6d00a74cbc07b…

MALICIOUS

PDF

73.9 KB Created: 2021-02-24 21:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dd7c47290348556a151c038799a6c9c8 SHA-1: 23ff101cc283b6e0ab44ef0d544dc80ba129e13c SHA-256: 20e6d00a74cbc07b7b20f292fecc39d6c25490e221e24348483108f36e8b4a27
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one, 'https://baarspo.ru/wix?keyword=samsung+un40j5200af+remote+app', appearing to be part of a link farm designed to redirect users. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to direct users to potentially harmful external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://baarspo.ru/wix?keyword=samsung+un40j5200af+remote+app PDF link annotation
    • https://cdn.sqhk.co/dokukavifig/faiftia/56485940297.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/the_art_of_r_programming.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/65954469706.pdfIn PDF document text
    • https://tiwoboromezusud.weebly.com/uploads/1/3/0/8/130874009/5367793.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/zurakopu.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/zigojukeru-menakutusowero.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/is_a_beats_pill_worth_it.pdfIn PDF document text
    • https://gumozudisi.weebly.com/uploads/1/3/0/8/130814032/9716968.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/hhxhjib/89904612863.pdfIn PDF document text
    • https://wiwufupa.weebly.com/uploads/1/3/2/8/132814928/c6f2582142c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://minofadejewezup.rf.gd/greedfall_guide_walkthrough.pdfIn PDF document text
    • http://badememaveg.rf.gd/62726265641.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/sqlite_browser_for_windows.pdfIn PDF document text
    • http://siwavubixuvavil.rf.gd/define_agrarian_reform_law.pdfIn PDF document text
    • http://pakilapawunafep.epizy.com/71679163459.pdfIn PDF document text
    • http://tinipukax.epizy.com/xunawexat.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_off0000e301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE301 5856 bytes
SHA-256: 1ed87c82a2bb4b6cb12ab56525e4522ce105aee465c5f6dbb56cbb5d3833c3e8
font_01_sfnt_off0000f6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EE 10476 bytes
SHA-256: d6e447f0531c30c6ca38bad69eb940813a4191caee97dd1dd3592c3f773dc406

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