Malicious PDF — malware analysis report

Static analysis result for SHA-256 51dc24a537de2555…

MALICIOUS

PDF

88.3 KB Created: 2021-04-03 03:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b5de1385a66ef7cae19a91925d57e506 SHA-1: 5754feb9ede37466f910b624f8c9527136a1e2e8 SHA-256: 51dc24a537de2555dfc6882e51c1829d645501508fc1cd1fbbc534e32c389d59
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • 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.
  • 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://nipisod.ru/award?keyword=character+of+shylock+pdf PDF link annotation
    • https://nawawedivoxoni.weebly.com/uploads/1/3/4/7/134719505/nanedunaxi.pdfIn PDF document text
    • http://testrun.ru/44938721507tdbhm.pdfIn PDF document text
    • http://citimart.online/85279503804zbkoq.pdfIn PDF document text
    • https://vikalixasu.weebly.com/uploads/1/3/4/6/134631782/e3c2e5ae8c300.pdfIn PDF document text
    • http://presentinsta.site/194317392566ch6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402710/normal_5ff5f61164b6b.pdfIn PDF document text
    • http://uggi-ugg.com/rasetesuwafuzewz4krg.pdfIn PDF document text
    • http://fsbsiod.com/what_does_iron_curtain_mean_in_world_historygdjjh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369629/normal_5fcf1bbaefb92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447658/normal_6034c8c78ff2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393189/normal_60066a0d23f80.pdfIn PDF document text
    • https://visorupa.weebly.com/uploads/1/3/5/3/135305290/sefur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409102/normal_6015f4755df61.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/lurutopobi/64941471575.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/commandos_game_android.pdfIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_6bcb227670224e2b8392b9d7e02d1b4c.pdf?index=trueIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_82e4cebfda8c4d908b8af91ca52c05ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/guxosa/android_annotation_processor_not_working.pdfIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_22a682b09ce5425281a80025a7ac023b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/clean_master_apk_pro.pdfIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_2ac0a9b7051347dc9aec87e2d662c972.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/focusrite_scarlett_2i2_2nd_gen_driver_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/1st_grade_math_multiplication_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/bailando_mp4_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/87995287150.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/muvokunijukotu.pdfIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_2439f4a275ae4200b1c2ec542cd7ccf3.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C6 5316 bytes
SHA-256: 5cd67e93586cc5bd8ff21a317791514721c444abd98c4d4f6326a9b83092411a
font_01_sfnt_off00012ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD9 11776 bytes
SHA-256: d83a6557e72aab6633623f1098ec5912453f5636961e08c20b08f536d83b6ddf

Open this report in the interactive analyzer, or submit your own file for analysis.