Malicious PDF — malware analysis report

Static analysis result for SHA-256 7575c5261cb7a84e…

MALICIOUS

PDF

85.4 KB Created: 2021-06-05 00:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f869955e079882454c0298a1fb7c91a SHA-1: 72d57fe5941295658ae24f86e5b9ecfbdbeddfa5 SHA-256: 7575c5261cb7a84ee77fbbfb72a1f751b3466becea54251dc32b102fe56ec974
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are likely part of a link farm designed to improve search engine rankings for specific keywords. The primary URL, 'https://crysiq.ru/pbw?utm_term=12th+class+biology+book+pdf+in+hindi', suggests a phishing or scam attempt disguised as educational content. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/pbw?utm_term=12th+class+biology+book+pdf+in+hindi
    • https://pobogovowot.weebly.com/uploads/1/3/5/3/135323888/vamafulevipam_patuvosizafudam.pdf
    • https://cdn-cms.f-static.net/uploads/4492573/normal_6019ae0a2172e.pdf
    • https://poroxokinawutaj.weebly.com/uploads/1/3/4/5/134507376/3addf591803e.pdf
    • https://dekodisiga.weebly.com/uploads/1/3/6/0/136051758/zorug.pdf
    • https://mudabirozaduzo.weebly.com/uploads/1/3/7/5/137514717/241172.pdf
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/zigat.pdf
    • https://cdn-cms.f-static.net/uploads/4379602/normal_602f0effb8526.pdf
    • https://betedodokadez.weebly.com/uploads/1/3/4/8/134882186/2537319.pdf
    • https://jifozotuno.weebly.com/uploads/1/3/4/7/134758187/1717519.pdf
    • https://cdn-cms.f-static.net/uploads/4403263/normal_606e29a2f21ed.pdf
    • https://cdn-cms.f-static.net/uploads/4374699/normal_605be3ecc57a6.pdf
    • https://sanivuledaxefe.weebly.com/uploads/1/3/4/2/134234591/jowokawexoba_komiwu_jozerifitolib_kexebi.pdf
    • https://tolubezilonis.weebly.com/uploads/1/3/5/3/135348590/b47d8eae2ed8.pdf
    • https://cdn-cms.f-static.net/uploads/4421783/normal_60338345d7e22.pdf
    • https://valodoxajub.weebly.com/uploads/1/3/4/4/134435871/5626725.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/f0b40f17-694b-46ec-9d58-46cd4da1e494/47192989315.pdf
    • http://bujolajoxek.pbworks.com/w/file/fetch/144528420/76051830956.pdf
    • https://uploads.strikinglycdn.com/files/2479537b-4131-419c-8155-9dce872f25c2/1200_bosquejos_biblicos_para_predicar_y_ensear.pdf
    • https://uploads.strikinglycdn.com/files/58e3664f-9a00-4a7f-a472-cc4ed5cc1d88/75760044712.pdf
    • https://uploads.strikinglycdn.com/files/06e60d7b-e7cc-4432-ad6a-57d39cc1a369/58010256249.pdf
    • http://vifogajo.pbworks.com/f/journeys_practice_book_grade_2.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3be.bin
457db592089feb6a9a16f96ccbddb480e3cf9c755a130df2f31e8149de359696		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 3256 bytes
font_01_sfnt_off0000ef79.bin
58a4b85c3127bb19556598a79bc5a899da4b33bb2f5ff04721cbb5cee1142017		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF79 5716 bytes
font_02_sfnt_off000102ff.bin
34cde7a0de807fe7359869dc9812bae6ac74e2c8e3539cdb26b61e5ba05228cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102FF 10460 bytes
font_03_sfnt_off0001270b.bin
a1e2968ca8c7638dd4bef022e186f3fea2b098bc52bbc7b81535a6634822059c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1270B 16060 bytes
font_04_sfnt_off00013bd8.bin
70c5d2d719fd0e285dfcfac34c3dccb0a8cd23783a5dc441a71158fbb1bc7b09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD8 2964 bytes

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