Malicious PDF — malware analysis report

Static analysis result for SHA-256 990fe56898abd539…

MALICIOUS

PDF

72.6 KB Created: 2021-03-10 21:21:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 00b1ae73b4b32d7179608cb54c689b9e SHA-1: e0c0f4e10521844aeb5f4ecbe0b41763d191426d SHA-256: 990fe56898abd539595b4487991f66a48eb9671e5974e138e8e0c182f5864e1a
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 multiple heuristics and an ML classifier, with ClamAV identifying it as a phishing trojan. It contains a link to a known malicious redirector, 'https://crophysi.ru/strik?utm_term=lincoln+weld+pak+180+hd', which is presented as a lure for a free download. No scripts were extracted, but the PDF structure and embedded link strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://crophysi.ru/strik?utm_term=lincoln+weld+pak+180+hd In PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_60160077f18b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410194/normal_60246eae97823.pdfIn PDF document text
    • https://cdn.sqhk.co/sevalaturi/sibgfhi/killer_bean_unleashed_hack_version_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pejinijew/Xhejchc/17656267277.pdfIn PDF document text
    • http://norasuzajo.mywebcommunity.org/service_of_non_alcoholic_beverages.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/jolebikolutevakisu.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/jfIgehj/nosisakapetiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_60239d857ac2a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_09fab90f7cf54f80adb47e91ad7999d8.pdf?index=trueIn PDF document text
    • http://xomapagovujux.atwebpages.com/56661832690.pdfIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_715536370cb14f16b22a99365878d4a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/binomial_distribution_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/medical_lab_quality_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/87919049237.pdfIn PDF document text
    • http://vegubom.atwebpages.com/kegolesiximo.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/how_to_open_downloaded_in_kindle_app.pdfIn PDF document text
    • http://mewabetowa.myartsonline.com/maytag_dishwasher_quiet_series_200_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/ue_megaboom_app_for_pc.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/can_you_use_regular_swiffer_pads_on_wetjet.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/25222829850.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDC 5372 bytes
SHA-256: b7054e42919004b55eb8aa74edbcaeb4adb819c66de5fb7905d557216e942df0
font_01_sfnt_off0000ee44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE44 11440 bytes
SHA-256: f1680fa63ebb624f9f3846978770dee2fd6c7b9cead4d45bbb232637ca45ca0d

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