Malicious PDF — malware analysis report

Static analysis result for SHA-256 158de517fa5d513f…

MALICIOUS

PDF

73.7 KB Created: 2021-02-06 15:01:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 861f0705229464532fdf53560aab94a2 SHA-1: 953280a40281469ba00f0b5ca07fbd7b6de7791e SHA-256: 158de517fa5d513fe815b84e3d9adead6d5c9574520d538cb01a826e51b95994
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/wb?keyword=bangla%20song%20oporadhi%20video%20song PDF link annotation
    • https://cdn.sqhk.co/mozoposowi/ehbjggi/english_radio_online_free_listen.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxinugokas/MhgijtZ/38204396974.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375885/normal_5feb9bb8a2c08.pdfIn PDF document text
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/9e2a38ee.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/Nif1Qgf/48527478629.pdfIn PDF document text
    • http://giftcard-sale.store/callus_formation_right_foot_icd_10mxoi6.pdfIn PDF document text
    • https://cdn.sqhk.co/tebolugex/jifhaGQ/leather_motorcycle_pants_near_me.pdfIn PDF document text
    • https://rubopawine.weebly.com/uploads/1/3/1/0/131070645/gumafisu_falosibatokoru_bekamazuf_kobemolero.pdfIn PDF document text
    • http://agencymedia-ig.com/diseo_y_analisis_de_experimentos_montgomery_octava_edicionllubx.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/EieidUJ/minecraft_pe_seeds_2020_stronghold.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/gozilum/gefumuvamivozawasutineret.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/linux_mint_install_android_adb.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/hydrocele_management_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/9417559035.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/install_android_adb_fastboot_1._7._msi.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_off0000e12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12B 5328 bytes
SHA-256: 974a86be0533bcc104d3cbf58615bd14dbaf513f1bd5739f978e982d9da89e9e
font_01_sfnt_off0000f34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34C 11560 bytes
SHA-256: c5e880582757d635be17480111ce2ae1b4b171536be6e2a02db6036bba2bdaeb

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