Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc09d532fdbe9a7e…

MALICIOUS

PDF

92.2 KB Created: 2021-04-07 02:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: cc1c90873d64b4873fb08aa8abac7975 SHA-1: 2b5609fc534b04f8d61fb5a43b66fe9fdf87f057 SHA-256: cc09d532fdbe9a7eb1eaa9cb0f6a93a1e026f04f9fc7620e70ce58cb955a35f7
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are associated with link farm heuristics, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/award?keyword=spoken+english+pdf+telugu PDF link annotation
    • https://cdn.sqhk.co/lokabawopup/bgeNH3t/jewels_switch_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/jinuzekovodi/yReggNq/susiwebagis.pdfIn PDF document text
    • http://opros.xyz/lost_in_time_crochet_patterns55ra.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422894/normal_5fef777389e85.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/8612646298659o15.pdfIn PDF document text
    • https://cdn.sqhk.co/gunumiku/jgBbjb2/bagri_ki_rabri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383567/normal_60669972e36f3.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/jaKyljh/playstation_2_emulator_for_android_free_download_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449405/normal_6068a5e008ab6.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/fwLvUEs/xanatuduzoradozus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454303/normal_5ff5fb797e237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412582/normal_5ffececdcb1a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_a441ecbb720b4df3b014c5ec34918079.pdf?index=trueIn PDF document text
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_a5285bc1480341f38d5d93b5998d7882.pdf?index=trueIn PDF document text
    • http://petizitopebil.epizy.com/cup_song_ukulele_chords.pdfIn PDF document text
    • http://kolofagigetu.epizy.com/chris_watts_murders_autopsy_report.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_b2355d1c3a05486998df28ef0d171e7b.pdf?index=trueIn PDF document text
    • http://gitipezusev.rf.gd/92432085357.pdfIn PDF document text
    • http://jofarasaxorepow.rf.gd/creation_of_internet.pdfIn PDF document text
    • http://xirotowukutizu.epizy.com/lulanifizuba.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_off0000eebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBC 5164 bytes
SHA-256: 2c45988b5dcf24b343eaffa7d07cd43fcfa91c0b7e7555a6175df42d41e42664
font_01_sfnt_off00010058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10058 28732 bytes
SHA-256: ae79a491da025dca35b1be1d92d66acd0c52f50f30644d67b931233e0451f0e0
font_02_sfnt_off00013c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C68 10748 bytes
SHA-256: 3f6953b0595b219130e8a19bc97bf9416d539b04cdcbd4cd467c9e150d22b2ff

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