Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c750e27f9928091…

MALICIOUS

PDF

40.1 KB Created: 2020-10-31 21:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 372d2f8258d0a46e3064aa748aafa85d SHA-1: 92350f6cadaaa9a728d46a52b4d6c9c0ef5ea0d9 SHA-256: 1c750e27f9928091cfda1755c8059cede4828a31a6b126775c329c389a855eaa
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a phishing lure for free movie downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.link/123?keyword=genesis+apk+movies In PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/8444287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393779/normal_5f93b001970f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5f9c62961a616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5f8c3c1ccd5f1.pdfIn PDF document text
    • https://sunuzokelegawo.weebly.com/uploads/1/3/4/4/134476032/7890793.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/193e2336-8055-4b02-bd4a-b9c14249fa89/que_esperar_cuando_se_esta_esperando_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/632d3b3e-c0b9-484d-ac85-e2ad77da6033/zelesumelavegasejopedoza.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/fizimeno.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/jevafozonifelolazuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5837/1496/files/xudaxedimewejafalifuwov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d921a68f-826d-469d-8697-138d8143c202/36189421446.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 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4F 4992 bytes
SHA-256: e7f673a97e062f3ee9cd7096753f58849f7a0f3bb232a91e22ea95b3b5a8243a
font_01_sfnt_off00006e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4C 10952 bytes
SHA-256: 29ef55c7b650d6ea964921293d83415ef562df613341cc92ddd2faf849a88ddd

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