Malicious PDF — malware analysis report

Static analysis result for SHA-256 800f690a777dbf23…

MALICIOUS

PDF

76.9 KB Created: 2021-03-15 19:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c8cca9a303c7a7728c0ad8202d514ae8 SHA-1: d383b23bcd46e52c41349df61b8375fff7290e8c SHA-256: 800f690a777dbf23e5b581194e9bb825836e1a5263028159df8c6ea4241ea159
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to redirect users to malicious sites. The primary lure appears to be a search result for "New Zealand white pages", directing to a URL that likely hosts a phishing page or malware. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://xajibur.ru/wix?keyword=new+zealand+white+pages PDF link annotation
    • https://sebuvijanamo.weebly.com/uploads/1/3/4/8/134856810/2437920.pdfIn PDF document text
    • https://ruvezidarumova.weebly.com/uploads/1/3/1/3/131380493/makemojon.pdfIn PDF document text
    • https://zomoxiwoginu.weebly.com/uploads/1/3/1/6/131637743/7dcbc49b88ef6b.pdfIn PDF document text
    • https://rawunixu.weebly.com/uploads/1/3/4/5/134527334/5437701.pdfIn PDF document text
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/luzumivuleguw-rosevako.pdfIn PDF document text
    • https://ralutadepijug.weebly.com/uploads/1/3/5/3/135305627/df2299921d.pdfIn PDF document text
    • https://memibufosigi.weebly.com/uploads/1/3/1/3/131383384/jogokiwaxup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wafobes.epizy.com/81985709309.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/6320985737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25fcb0d3-94a3-4892-b178-8b81ecf4e9d8/mojaredojufagisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f13d92e-3fde-49b4-8522-7c7953f69fdf/multi-flow_thinking_map_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/nairabet_com_app.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/reference_sheet_maths_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff53ca74-28c0-4e87-b1b3-d00d9353b60a/medevigojulirodalob.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/awdhesh_premi_ka_gana_ing_hd_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e9a4c50-7a78-403e-967d-db6963601ca1/is_5x5_enough_for_hypertrophy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e15cce-c174-41fe-9955-5ed86e515989/76948879740.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/id_card_size_template_vector.pdfIn PDF document text
    • http://zugosixefi.epizy.com/everyday_use_theme.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_off0000ee37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 5236 bytes
SHA-256: 43b632065bc530e1918f2caf40948bf39131ad4e93c1242b5a355c6ae22984e8
font_01_sfnt_off00010022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10022 10744 bytes
SHA-256: f73ac52204c4fca2c6a7cd2ae29a14ec6af890c61a8da4d705626e6154b67e71

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