Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8fe27aa027db535…

MALICIOUS

PDF

73.2 KB Created: 2021-03-01 18:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 789600b9bc67294b037b1556bc6ed0ff SHA-1: 24b7c12d4f2037540d0994c20de146bd0c45d2f4 SHA-256: a8fe27aa027db535a737e2522a047df3f492ef7d6f444eda705fdc3f20d2912b
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://vilenefex.ru/award?keyword=john+deere+js63+carburetor+diagram PDF link annotation
    • http://mosomupusafebin.medianewsonline.com/patokebebaxorekeliraku.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/lg_washing_machine_top_load_filter_cleaning.pdfIn PDF document text
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/7562739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465688/normal_601cb163c30da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460228/normal_60355ec96c312.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367905/normal_5fcf5c9043415.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379048/normal_5ff8b4e5cecf8.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/OLmqhiC/storm_racing_drone_srd280_v5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426425/normal_5fd02c2eb7459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_601b444d1c5eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424349/normal_5fc8d9345c802.pdfIn PDF document text
    • https://golisarupu.weebly.com/uploads/1/3/5/3/135317681/8351580.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392661/normal_5fcdbd1c9e4f9.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/tone_it_up_protein_shakes_target.pdfIn PDF document text
    • https://cdn.sqhk.co/sibamoxa/bjicicR/66387190211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376120/normal_5fcbd8f80b43b.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/76405341742.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
    • 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_off0000d4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BB 5724 bytes
SHA-256: 220843596cb4c0ea34c7f521cda7c75b84bf3ebb01c43241f6aa3cd632106542
font_01_sfnt_off0000e802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE802 9816 bytes
SHA-256: aaedbf21786684fa9b74d07b99fdd51d335a778e68a6dc816119f0472910425c
font_02_sfnt_off000109a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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