Malicious PDF — malware analysis report

Static analysis result for SHA-256 1610b34971f70416…

MALICIOUS

PDF

70.9 KB Created: 2021-03-28 11:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0e1d8a76ababf44b30860da58549903f SHA-1: fdee13d93af28065de66b476a7c3dd9f00e7acd5 SHA-256: 1610b34971f7041646873b98d18318770f25d27a78f3709c145019bd34bf8e69
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure related to 'album cover art finder apk' and redirects to a suspicious URL, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI point towards a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/123?utm_term=album+cover+art+finder+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366335/normal_60386361da9f7.pdfIn PDF document text
    • http://zaxiluxedexu.getenjoyment.net/goxevukegexekig.pdfIn PDF document text
    • http://xoruresifif.iblogger.org/look_back_in_anger_john_osborne_download.pdfIn PDF document text
    • http://fanuvazav.scienceontheweb.net/81896693982.pdfIn PDF document text
    • http://fonexewof.mygamesonline.org/vastu_shastra_book_in_english.pdfIn PDF document text
    • http://zagunur.22web.org/69923804455.pdfIn PDF document text
    • http://zazafuzavap.22web.org/african_church_history.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388065/normal_600659993eb58.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/negonanopix/transformao_isotermica_isobarica_e_isovolumetrica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc43de4b-283a-4881-8b6f-b067a8ad6f5e/how_much_is_itil_foundation_exam_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/mirudemamekon.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/xo_tour_llif3_piano_sheet.pdfIn PDF document text
    • http://sewejatoxomo.rf.gd/yaseen_sharif_online.pdfIn PDF document text
    • http://feruvemijajo.epizy.com/mowutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280e3c50-6352-42dc-a438-0fcaafa0b880/borab.pdfIn PDF document text
    • http://fanulatanaz.rf.gd/eular_2019_psoriatic_arthritis_guidelines.pdfIn PDF document text
    • http://rurogapon.rf.gd/tufexivowoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e5f2a1e-f953-46c7-b25a-87d859b722e6/82549395005.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/zidemijasenajazipomor.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5B 5260 bytes
SHA-256: ad25fd054890e8451f194ce472161a569469ee97f585ccc53843f8e7b7a96e5b
font_01_sfnt_off0000dd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1A 10580 bytes
SHA-256: e082c4b974e2332549552803e39d911c61d4dd26e9ba996843744e970d44c5d9
font_02_sfnt_off0001007a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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