Malicious PDF — malware analysis report

Static analysis result for SHA-256 c21c03697fa4c198…

MALICIOUS

PDF

71.5 KB Created: 2020-08-24 13:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 41a414a21d64143bf0c2d7b5c14c29e0 SHA-1: 745bc27dd37f1bd17b5b26726637e84fbd76af67 SHA-256: c21c03697fa4c198ec7fe66dd59d4918dd2f32ae722156e9393359d45ca3c48c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to 'free microsoft word lease agreement template' and the malicious URL. This suggests a social engineering lure to drive traffic to malicious infrastructure.

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://ttraff.cc/pify?keyword=free+microsoft+word+lease+agreement+template In PDF document text
    • http://jitem.ownerbuildercourses.com/uploads/1/3/1/6/131606746/a6366.pdfIn PDF document text
    • http://files.pittsboroumc.org/uploads/1/3/0/9/130969211/d79176da07f0f91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7444/4694/files/beatriz_sarlo_tempo_passado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8355/4206/files/mobile_coffee_shop_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3591/8489/files/pokawaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0172/4580/files/84751022264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/snake_cool_math.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9873/2696/files/zevivivebif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6418/5247/files/4_main_branches_of_philosophy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/jegekurasuxetanawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1103/9655/files/mikuf.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 2

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_off0000cf78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF78 5520 bytes
SHA-256: 75e723ac0e27c18beb9d620f13d45f2ab0373768b09e339526ac9fab191fd93d
font_01_sfnt_off0000e236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE236 15088 bytes
SHA-256: 535973d6a0c43533fe7e4cc5b2437209fc3ac0e765801eb3fbb81ffe22582667

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