Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc1e09b1d58f5ef…

MALICIOUS

PDF

76.2 KB Created: 2021-05-23 11:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 186e3aa79d80e11aacdd1e1a1fbe56fc SHA-1: de11976696d663a88ffe06cf34c21738852c56ec SHA-256: 0fc1e09b1d58f5efd2d76716b4e5e4f569d8a1d75b0c71f3f5163843601fe64d
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 0.9997

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://crophysi.ru/strik?utm_term=cross+cultural+communication+workshop+activities PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443821/normal_5fd63264bef65.pdfIn PDF document text
    • https://sepebukov.weebly.com/uploads/1/3/1/4/131408100/3314146.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471686/normal_6003e18884076.pdfIn PDF document text
    • https://sisasava.weebly.com/uploads/1/3/0/7/130738988/f13f08b.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/wuniku/cars_the_video_game_free_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/nitozap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b04558-d843-44ae-8882-6e5a6c98dc1d/vintage_charmglow_grill_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/is_it_good_to_mow_lawn_without_catcher.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/alexander_hamilton_musical_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfdad5dc-101b-4753-bc4d-33caa263b41c/carol_duncan_art_museums_and_the_ritual_of_citizenship.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/lutexefep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/644a5491-f87c-4128-88de-c68b7f88549d/what_android_version_is_samsung_galaxy_tab_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d46906ff-656e-4ff6-915c-6675ed4a7d97/tadikesejuwiregede.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/mabosotugovofugarokagojuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c32a986-c2c0-4268-b621-7427de04e9ad/a_letter_to_my_nephew_audience.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/768d8da6-7f6a-4968-84aa-340d2e533222/fufisaruga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78ea119c-9b14-45ef-b8e1-77cc16010453/gofeleludiwibanibuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c471b880-3cb8-476d-99f2-8b5edc43f5c0/lesisizabiladokor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/781afa76-6879-4a7f-bffc-93aad85ec13f/the_wages_of_whiteness_david_roediger.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/what_is_evicted_in_irish.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_off0000ee4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4C 5296 bytes
SHA-256: 6c3bb471dbd6f532503c3d5122b6fdccfa28ff955598e4ade43a0a2465831410
font_01_sfnt_off00010039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10039 10364 bytes
SHA-256: 267bac46b633f6be7cd923cb4de394704e72fe53aabc05ad9c3dc8a0f4755b62

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