Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a2d2c83030d67b…

MALICIOUS

PDF

81.9 KB Created: 2021-05-21 20:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e1f415e90c694fcd3611e9db6674e41b SHA-1: 72ae49d288b24ad04bc2532b409354698c8cc6b4 SHA-256: e1a2d2c83030d67b6d9d167ed81318c3224af31c8201995ceaed81e8981d04a2
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 0.9998

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://jottigo.ru/strik?utm_term=is+the+drone+pilot+test+hard PDF link annotation
    • https://lolizafopig.weebly.com/uploads/1/3/1/4/131453679/3230217614d5f51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_5fe94ccc89795.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/vufaru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404313/normal_5ff947bfc683d.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/5949699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_5fd37a1c93edb.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/kikunojulejuj/i_got_sun_in_my_pocket_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/39352137229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5ee9fb-f5f5-4089-ae84-7e74dd750366/apc_550_battery_replacement_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ffd49ce-823b-4866-a3be-ddc01872d834/mukaxalekerakenoxik.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/lojepenepusipetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff638934-2fc6-4a93-b526-78246f7af126/9195350095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e74bec5-3f74-4e8c-8a90-3b63b48add84/fisher_price_rainforest_bouncer_assembly.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/61858066028.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/bloomberg_market_concepts_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/old_macdonald_had_a_farm_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d364e0-e6ed-4bac-a90d-dab67099cc8d/88902526590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf1f670-e9a6-490e-a761-cc76abf3ab36/58685710190.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/27583629998.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF615 4772 bytes
SHA-256: 3adf3afc306ba5ca9cc4c60e8058010048874b384f876188ff6a77c5959e6f27
font_01_sfnt_off0001062f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 11080 bytes
SHA-256: 61bd0c3cea41a8248878223c12421007cd8dd20cdb3acf6e36c94b7390cbbc85
font_02_sfnt_off00012c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C07 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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