Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a62a69d9bd673ca…

MALICIOUS

PDF

78.4 KB Created: 2021-04-23 19:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1427f4060b57ecfe8c7dbcd844790be1 SHA-1: 9012434b170a61e5c77c8f664d54313f2ea51c28 SHA-256: 1a62a69d9bd673caeea64b2c744788bcb5bffe801299b8c8becfd1cf160e13b4
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. ClamAV and ML heuristics confirm its malicious nature, flagging it as a phishing trojan. While no scripts were extracted, the presence of numerous unknown URLs suggests a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://zajinet.ru/strik?utm_term=hoover+carpet+cleaner+spinscrub+50 PDF link annotation
    • http://vevaxogejaz.scienceontheweb.net/how_to_use_master_forge_smoker.pdfIn PDF document text
    • https://laludigulasi.weebly.com/uploads/1/3/1/4/131437637/gisakolezugiz.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/113001178.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/lulomukowapedir.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/8724137490.pdfIn PDF document text
    • http://help-mediasupport.com/vevufexdllvg.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/59810472192.pdfIn PDF document text
    • http://bijepitujutix.sportsontheweb.net/55110250593.pdfIn PDF document text
    • http://extrameets.fun/beagle_breeders_ma6g7o5.pdfIn PDF document text
    • http://ninuwekevap.scienceontheweb.net/31007541523.pdfIn PDF document text
    • https://bazuxenulasiv.weebly.com/uploads/1/3/0/7/130740357/mesebaxeguvonawofafu.pdfIn PDF document text
    • https://sonoxezepokamev.weebly.com/uploads/1/3/3/9/133999938/sutik-pawuvo.pdfIn PDF document text
    • https://vuwuzujos.weebly.com/uploads/1/3/2/7/132712237/zawalobe.pdfIn PDF document text
    • http://successinyourlif.website/bigemekupiwedowebakubius80y.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/9519202.pdfIn PDF document text
    • https://dimawirosaj.weebly.com/uploads/1/3/3/9/133997296/vakixawasuku_kibukawajosi_zixena.pdfIn PDF document text
    • https://zatikavetix.weebly.com/uploads/1/3/2/3/132303242/binotivenu.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/type_2_diabetes_mellitus_2020.pdfIn PDF document text
    • https://vopukuno.weebly.com/uploads/1/3/1/3/131383764/tutowejafok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_aa5d36cf5a014f3391b91cd41d00207a.pdf?index=trueIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_43ecab84ee5948cba16b41a223f56f6b.pdf?index=trueIn PDF document text
    • https://63995da9-74be-4895-8497-a4fa53c9845d.filesusr.com/ugd/788c84_25572f84fb4043e48e8307c061d652eb.pdf?index=trueIn PDF document text
    • https://5c126656-fc4f-473b-8c99-11744d2e1b96.filesusr.com/ugd/abd8ec_c8807a55c9c5478f953787eec253c04e.pdf?index=trueIn PDF document text
    • http://sinusisokopex.atwebpages.com/zubasunogitonusakawogomus.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/mokegoful.pdfIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_dafcb7f478e6472a943a8f99441c0531.pdf?index=trueIn 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_off0000f2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DA 5356 bytes
SHA-256: ed92cc01cda55d474d066634ce1cbe8594215b017caa765df70bb785cb8701af
font_01_sfnt_off0001051d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051D 11592 bytes
SHA-256: 38271746e7286b24c724e85d78348f7b0142cd7ad44cae5f4e861476cc4410e7