Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6589d872e0be286…

MALICIOUS

PDF

101.6 KB Created: 2021-04-04 18:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4ae52100cff0e15bd092133b1b8ceb7c SHA-1: 4fc5fb56c85ed2438eacb53aa07eb5c7f71b4fec SHA-256: f6589d872e0be286fa56674b5b003b0577e901faf7a0302573a71d3725a52824
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware sites. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious redirection tactics.

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://xezojetit.ru/wix?keyword=the+ant+and+the+grasshopper+pdf PDF link annotation
    • http://tufuwavaziga.mygamesonline.org/shop-vac_5-gallon_2.0_peak_hp_vacuum_manual.pdfIn PDF document text
    • http://zootime.store/fire_emblem_three_houses_conversation_guide2my2w.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/mechanical_keyboard_switchesemxao.pdfIn PDF document text
    • https://xanusikufugab.weebly.com/uploads/1/3/4/3/134371049/xalila.pdfIn PDF document text
    • http://tradebot.space/lowilarosefirap9leh.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/bawol.pdfIn PDF document text
    • https://rejonogatu.weebly.com/uploads/1/3/5/3/135392998/nuwowogise-timajokil.pdfIn PDF document text
    • https://dimenitajobe.weebly.com/uploads/1/3/4/4/134444553/26dce5.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/95325563636zja1q.pdfIn PDF document text
    • http://kakorixow.mygamesonline.org/bitanuk.pdfIn PDF document text
    • https://mafugefowodofo.weebly.com/uploads/1/3/1/3/131378796/bd4cca.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/canon_mg3520_wireless_setup_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://raxegujanamefas.atwebpages.com/turezumezamofapotumoj.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/pexuxemubusadomabilozo.pdfIn PDF document text
    • https://d6921c5e-ad40-47a8-8d28-605c6bd4eeef.filesusr.com/ugd/3306a4_b022b7b4bdb64c96a64f942c403b2e03.pdf?index=trueIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_11a0e60812e847b8ba4a1699aa071c58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numunenoji/kugekad.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/43660521402.pdfIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_49e1e5ca5ce34d68b94f26c422ae7410.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivuxo/bestwap_full_movie_2019.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/rugituvovodeponepasegiges.pdfIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_9b8e35d2a9474ca0a932f6c0e558e010.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizabo/pumifafeluxejoni.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_off00014b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B28 5220 bytes
SHA-256: 8bb9cae08048e5b238ff98b77b1e19a6440e1196c17a69f228b6dab1b4e3f25e
font_01_sfnt_off00015ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CE7 14812 bytes
SHA-256: 44caed5f4a4f761483a0550514bc691ab5aae5adbd210369ec0832f6375691ce