Malicious PDF — malware analysis report

Static analysis result for SHA-256 887ce4ea72929259…

MALICIOUS

PDF

104.8 KB Created: 2021-02-13 21:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4cdebb1bf884bfe72357a77a63cba0ed SHA-1: fcaf63872ba0af8e930dad24c3ef9a3a9664869b SHA-256: 887ce4ea72929259d02fcf948a56fe8d9128065169c03118be858331fc6ffbe3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'seumenha.ru' which is flagged as a potential phishing or malware distribution site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://seumenha.ru/123?utm_term=kitchen+nightmares+zeke%2527s+candace PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469350/normal_5fca7f64574a2.pdfIn PDF document text
    • http://jajosez.iblogger.org/78095172029.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491686/normal_5fff98f65e679.pdfIn PDF document text
    • http://mosasekoz.22web.org/lions_foundation_dog_guides_canada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450630/normal_5ffda6c9a4516.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/lososimap/samsung_galaxy_store_apk.pdfIn PDF document text
    • http://beverotunege.epizy.com/frogfish_care_guide.pdfIn PDF document text
    • http://tijelide.rf.gd/zugawuxugimaxonadidopi.pdfIn PDF document text
    • http://pamilov.epizy.com/nielsen_total_audience_report_2018.pdfIn PDF document text
    • http://bibedufuranuju.rf.gd/78361339548.pdfIn PDF document text
    • http://butexageteril.rf.gd/free_graphic_design_app_for_android.pdfIn PDF document text
    • http://mogopubu.epizy.com/dutufefolibewu.pdfIn PDF document text
    • http://bozalusi.epizy.com/vodiloka.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/canada_goose_langford_parka_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/lac_d_annecy_tourist_information.pdfIn PDF document text
    • http://zefobik.epizy.com/bolted_joint_design.pdfIn PDF document text
    • http://vokunewegulu.epizy.com/ximeg.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/bisotesusironetap.pdfIn PDF document text
    • http://savefativiluz.epizy.com/live_wallpaper_hd_for_pc.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF363 30748 bytes
SHA-256: 9663aa0ec71158c515b3c2ed94ccb1814285710003c7c17fc519277362f7044f
font_01_sfnt_off0001528f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1528F 5116 bytes
SHA-256: c346aa991691879bf59338a76a87b017cb725528aeb4ab09e4fc5da8c481a39a
font_02_sfnt_off000163bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163BB 10260 bytes
SHA-256: 3cdea548f30d8d9de0f1c540f79d437446c5360e563524037d2c95aef947a1ee
font_03_sfnt_off000186e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186E2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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