Malicious PDF — malware analysis report

Static analysis result for SHA-256 1914fd40323dd840…

MALICIOUS

PDF

67.9 KB Created: 2020-11-20 02:03:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 718d831891702b22e0647e5b6e011022 SHA-1: d1609ec7bc6049614dd7bc21b83cace48d450465 SHA-256: 1914fd40323dd840d516b887a04dbc7aae19a9f474a851a5781b3763411b161e
254 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, one of which points to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'Highest gas prices in death valley'. The presence of numerous PDF links and a critical heuristic firing for a malicious redirector indicates a phishing or malware distribution attempt. No scripts were extracted from this sample.

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
  • 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://traffine.ru/123?utm_term=highest+gas+prices+in+death+valley In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5fa704b015862.pdfIn PDF document text
    • https://japilosibif.weebly.com/uploads/1/3/4/5/134578465/mupovafunaxas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405467/normal_5faa4bca7a078.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/key_budget_highlights_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf6042bc-8ea8-420a-8058-6294491f6449/63213747196.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/9791793553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2257cbb-28e8-4911-b041-5cec0ca30eb8/blue_shotgun_shells_rust.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bccaf07-92ad-44e8-a702-921c8ecb84e4/lekitusotarevoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffd42f9b-c0da-47e9-8a38-c7ef0a8feb06/murekufolejekexuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06577631-07b8-44b9-943b-3f94dd86df99/51461514429.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/kotisakifox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9af4a10-401b-4d38-932e-d418692d246b/casio_wave_ceptor_3140_atomic_watch_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/23046877219.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/xebuzunilowaderitamezid.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 6

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_off0000c9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AF 5456 bytes
SHA-256: 87e2b3bf508574da70a842b5b183cfca8569963edee8969d01df8c07396d8b2f
font_01_sfnt_off0000dc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC48 11136 bytes
SHA-256: 6e9241d21421cb47f0b8193c732f31b6ee6b57839c1016790d0a9e94bc744a45

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