Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1d95da066ba5c4…

MALICIOUS

PDF

47.4 KB Created: 2020-10-29 23:27:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0506054dc7052d6904f3bd0da5444147 SHA-1: 2b5a803fba1d31e12e4766692ce744b152373bfe SHA-256: fd1d95da066ba5c46b2680e878fd66ebe3891093c589512a343fcf1739099302
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains multiple links to known malicious redirectors and SEO link farms. The document body, though heavily obfuscated, contains URLs that are likely intended to lead users to phishing or malware download sites. The presence of numerous external links suggests a link farm designed to manipulate search engine results for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=ufcu+routing+number+texas In PDF document text
    • https://bazademirijef.weebly.com/uploads/1/3/4/4/134464354/suxezewe-ziwazivawidimof-xusuwibogujak.pdfIn PDF document text
    • https://tukibasitotaz.weebly.com/uploads/1/3/4/4/134445351/e371db9.pdfIn PDF document text
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/jonelipusek_zimuza.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/ranelamegoxogaxigur.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/2c169f6c3cb6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f8eea3e5edd5.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://cdn.shopify.com/s/files/1/0499/8030/9675/files/hum_tumhare_hain_sanam_songs_download_wapking.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/frank_gotti_agnello_wife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9883/9970/files/82065832781.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/91767019392.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/vanutu.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/excel_test_questions_and_answers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A3 5252 bytes
SHA-256: 6058326a8d0fb51f54005b93d210be7df297f0c50ccac96ce06af4d75fc48c34
font_01_sfnt_off00007560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7560 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00007dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEE 10752 bytes
SHA-256: 89566deb6fd8987590a0979614862754440d3219540b154afac8239834a12e27
font_03_sfnt_off0000a28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA28C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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