Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9d01f4fba9e5f1…

MALICIOUS

PDF

93.7 KB Created: 2021-05-09 15:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8b9e9dbd26f968c6c4af77ac7f751d93 SHA-1: efaeceee7d6e9347a4d59e328f888488b7ca8cf2 SHA-256: 2a9d01f4fba9e5f1ba6cfd5ecbb6ba74e25d406dc07c3fca77b94aa9bc2eb205
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. ClamAV detected the file as Pdf.Phishing.Trojan, and a machine learning classifier also flagged it as malicious. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 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.
  • 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=simplifying+algebraic+fractions+worksheet+gcse PDF link annotation
    • http://vatamuvemazaril.sportsontheweb.net/convertisseur_anglais_francais.pdfIn PDF document text
    • https://setibadumizokeg.weebly.com/uploads/1/3/4/8/134880372/kebavuf.pdfIn PDF document text
    • https://kapebuzuzevasa.weebly.com/uploads/1/3/4/5/134587117/zijepisuroga.pdfIn PDF document text
    • https://vuxomikegivu.weebly.com/uploads/1/3/1/4/131453843/fuxopitiz_jaxikefugivi_pumopojajan.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/53076787963.pdfIn PDF document text
    • https://nuluziberalisox.weebly.com/uploads/1/3/1/3/131379655/eeb30e.pdfIn PDF document text
    • https://vuvonuzomuvi.weebly.com/uploads/1/3/4/5/134508102/jefuzidufapepuf-tilebokoz.pdfIn PDF document text
    • https://visatedujapi.weebly.com/uploads/1/3/0/8/130814459/wujijirexo_jobigavulew_dexox.pdfIn PDF document text
    • https://xoxatazafej.weebly.com/uploads/1/3/4/8/134861408/bekupufuxov.pdfIn PDF document text
    • http://gunofixe.medianewsonline.com/ashirwad_pipe_price_list_2020.pdfIn PDF document text
    • http://xepuxesadara.mypressonline.com/87197024764.pdfIn PDF document text
    • https://paxolobiwoke.weebly.com/uploads/1/3/1/1/131163878/5374186.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/lazabom.pdfIn PDF document text
    • http://zisezamerares.mygamesonline.org/7474917463.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/spaces_bed_sheets_king_size.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/66297845844.pdfIn PDF document text
    • http://dexadusoxeb.atwebpages.com/original_articles_of_confederation.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/christmas_colouring_sheets_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/57167771278.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/puwuwuxexukol.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/weremof.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/vw_polo_9n3_service_manual.pdfIn PDF document text
    • http://wumugajus.onlinewebshop.net/insignia_24_inch_fire_tv_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/best_android_phones_2018_in_kenya.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12405 5932 bytes
SHA-256: 4f180d9b0eb20d5628a20ad24dac9ebea781fe42c91cb126289a4dace97665ba
font_01_sfnt_off0001381f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1381F 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000140ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140AD 11816 bytes
SHA-256: c21f526ca9fee0e2860fb1bd400928dbf613d321d32ff4e3e17c34daeefefa6c

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