Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cfba1096df04a27…

MALICIOUS

PDF

69.6 KB Created: 2021-03-28 10:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8d2bbdc0891e10bdee38bc0571e80bd2 SHA-1: 947d2051c8a29637a038ca0cac2d5e274fa37975 SHA-256: 4cfba1096df04a2776f5e7eaea6ec044999eafff2a2f4243646c137716d8a5fb
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 0.9991

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 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://xezojetit.ru/wix?keyword=types+of+galaxies+worksheet+middle+school PDF link annotation
    • https://jemexegotida.weebly.com/uploads/1/3/4/4/134464186/fukimixetolori.pdfIn PDF document text
    • https://fupefodomixeja.weebly.com/uploads/1/3/4/8/134889506/9e5e6b.pdfIn PDF document text
    • https://niwosegebopusa.weebly.com/uploads/1/3/4/5/134583118/0777ce1bac.pdfIn PDF document text
    • https://temerineg.weebly.com/uploads/1/3/0/9/130969052/3844263.pdfIn PDF document text
    • https://figokafudifugi.weebly.com/uploads/1/3/1/3/131383964/422545.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/megelugik/ar_rahman_hits_tamil_masstamilan.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/optiplex_760_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee8721e-f377-4646-aa7d-393a6407bbf3/zererolivevet.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/memibabawopede.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/19749185085.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/animate_cc_free_with_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80c60b3a-ca25-4323-b1f7-c74a37e66069/mizexopojumisimuduzuxuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc8ae06-032e-47b7-bacc-cdd73b581169/bokatarisukonulakawuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6170e4a1-41e5-4691-b40b-7b6afe23e7e4/what_does_it_mean_to_fetch_firewood_in_a_dream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f447b9c-2e07-484d-b264-f9f455d8f7aa/jekodorexawomar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c8c873-1518-4a8e-a2b1-f13e8fdf1dcd/power_cooker_pressure_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dca3bb7-f728-48ec-9683-54372e693b87/toresuponizojosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77fe26b-8eea-418a-83ff-4d9b0f5332ed/temifete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b4f602-46db-44a5-8da0-6f07c37093b8/36105047636.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/89433663584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ead590-4f0f-40ea-899b-48e2b748f3b8/how_long_does_a_ds_battery_last.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/37982665269.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/valijukip.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/49183628845.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_off0000d18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18F 5844 bytes
SHA-256: aca12feca8541ec7195f40f872479fe8681e5a48d6c227115763063430191ec2
font_01_sfnt_off0000e56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56D 10236 bytes
SHA-256: f58770b0454b2ed50fe415109bc40b44dff049dbb6f9f83154b569b837ddaf7c

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