Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83f708343cbc63a…

MALICIOUS

PDF

77.8 KB Created: 2021-02-17 08:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 336805a8abfa8068d47598e8d9dd25ad SHA-1: 2e700ea9fe9d2fbd6261173f29c414cf1e2e78ca SHA-256: a83f708343cbc63a2205ed3595421d16963bb1e4e05b96610b829cc333884b99
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and contains heuristics indicating it is a phishing lure. The document body, though heavily obfuscated, appears to be related to a Samsung washer filter cleaning query, which is used to direct users to the malicious URL https://jottigo.ru/strik?utm_term=how+do+you+clean+the+filter+on+a+samsung+washer. This URL is likely used for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=how+do+you+clean+the+filter+on+a+samsung+washer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5fdc0f26e8f7a.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/tedeperomita7plh7.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/Qjihbjj/tizekuxufijademabu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493549/normal_5feecf0ebbd31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454819/normal_5ff575d33d023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389085/normal_5fe8b17d86e46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_5fe7e61ab1074.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406456/normal_5fcb239ced692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415051/normal_5fd94982a72a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445573/normal_6003dfe36786c.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/48814786151.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
    • http://zawemitop.epizy.com/bootstrap_templates_html5_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE573 5472 bytes
SHA-256: 834f28d6c6422dfdf9eb8c4bd3179072314111f05b0195977146ee9a2ba61aa6
font_01_sfnt_off0000f7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F5 10376 bytes
SHA-256: de86a445d1dff912c6d79870b4da83c5ca023c44a83f881b934fef48ce271d81
font_02_sfnt_off00011b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B72 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.