Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a67048fa1bbf1e…

MALICIOUS

PDF

86.7 KB Created: 2021-04-03 02:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: aee17e6c7e4ed732be23cc5dae7e6600 SHA-1: 9a86d6fbd37f23c5b889c312605a801e64d41498 SHA-256: b7a67048fa1bbf1e41c0e2b5b8d25f0dc743651a3c5774f7839d8c43187556fe
214 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, forming a link farm designed to manipulate search engine results. One of the primary links, 'https://crophysi.ru/wix?keyword=high+school+gymnastics+near+me', is identified as a known malicious redirector. The document's structure and the presence of these links strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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=high+school+gymnastics+near+me In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476152/normal_5fd2af63a678a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385410/normal_5ffad00368f95.pdfIn PDF document text
    • https://cdn.sqhk.co/niporatibu/g56mdjf/best_powerpoint_templates_with_animation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403130/normal_5fca22badd467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_601833ae897f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409819/normal_603f7f11598e3.pdfIn PDF document text
    • https://cdn.sqhk.co/nidimejuzu/ghghmif/line_segment_geometry_real_life_example.pdfIn PDF document text
    • http://gidubanijokov.22web.org/tatamexugilopalabakibiro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_c285ae41301c46d9a063b7e089db308b.pdf?index=trueIn PDF document text
    • http://zufomukibataj.rf.gd/gross_pay_vs_net_pay_worksheet.pdfIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_1596204fd3634292b1b8497f8b07de9a.pdf?index=trueIn PDF document text
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_c551e5ec00374dc7b5a92cbd4a7f2f6c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/womirofop/jurivalajuzebexidapup.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/lol_fizz_build_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/date_and_time_format_in_c.pdfIn PDF document text
    • http://puguvapalovuzub.rf.gd/candy_crush_soda_mod_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/lolozuzazekofej.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/abcd_movie_video_song_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/variance_and_standard_deviation_ppt_slideshare.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_2070d6e35698412dafdf5eb9e224c45a.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_off0001142a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142A 5276 bytes
SHA-256: d2daf587d96d4f3d8104c6bd400208fec7ebd4ff29d85d6b0029654ea1cea453
font_01_sfnt_off000125ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FF 11556 bytes
SHA-256: 8145bda8f09dc6c81ab4abbc74de4fffca75a37339709e09ff8a47a3ee2e8c0e

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