Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0175b6156f3e68b…

MALICIOUS

PDF

69.4 KB Created: 2021-03-29 23:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 55983d46279b1cac6a4901a9f8775dcc SHA-1: 52fca6c463cbc879c38560a2490772b2486975f2 SHA-256: c0175b6156f3e68bf3d58f19e0c4fabff484a0b741539082e56fc8ee16aba937
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/wix?keyword=pacific+northwest+soccer+club PDF link annotation
    • http://nebuxopav.mypressonline.com/tamil_text_book_online.pdfIn PDF document text
    • http://figironeme.22web.org/21757879392.pdfIn PDF document text
    • https://xajakubadom.weebly.com/uploads/1/3/0/8/130874473/7245059.pdfIn PDF document text
    • http://nenamusun.iblogger.org/new_construction_checklist.pdfIn PDF document text
    • http://jekigun.22web.org/ample_guitar_m_ii.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/4194932.pdfIn PDF document text
    • https://lokamafurixese.weebly.com/uploads/1/3/4/5/134509290/2592529.pdfIn PDF document text
    • https://nozudepoget.weebly.com/uploads/1/3/1/1/131163917/lanogorik-munoxuwimowu-rozepaboz-jafotemorav.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/53140033034.pdfIn PDF document text
    • http://vonokumi.iblogger.org/firehouse_subs_allergen_menu.pdfIn PDF document text
    • http://mepanawabopod.22web.org/the_dark_side_of_the_light_chasers_download.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/fojaxexino/solow_model.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/analyzing_editorial_cartoons_worksheet.pdfIn PDF document text
    • http://vedezaduxi.epizy.com/xupir.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/bixipagalosowakidogo.pdfIn PDF document text
    • http://mofomunor.rf.gd/what_is_the_best_templar_build_eso.pdfIn PDF document text
    • http://sasotogatajuxiw.rf.gd/origenes_del_neoliberalismo_en_mexico.pdfIn PDF document text
    • http://kexomun.myartsonline.com/zogawumibakotutiwivodab.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/gagusujesisijilefa.pdfIn PDF document text
    • http://mafefelanepule.epizy.com/xaxafetedeposirupedod.pdfIn PDF document text
    • http://zosujudete.epizy.com/relonifuvifezutonaji.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/98397037127.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_off0000d189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD189 5200 bytes
SHA-256: 34e9233dd0036f391c63e00562f31b89087d942c85574e78465c1a1a051c302d
font_01_sfnt_off0000e349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE349 10376 bytes
SHA-256: 6e21543eed8cc72616a95d833f9251b58111fce3ab60856b93fbe10072d4be02

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