Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5cd11c8f8b6b029…

MALICIOUS

PDF

132.8 KB Created: 2021-07-14 00:39:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ed903c9b2e412452f8247b9351250ff3 SHA-1: 2b87f308642f65d6ef5fa3014b35634244298ae2 SHA-256: d5cd11c8f8b6b02978544f05bd0a2f6c3d2d0f348cc3a4b9bb07438a647878d8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-risk heuristic indicating it's an SEO redirector link, likely for phishing or malware distribution. The embedded URL points to a suspicious domain, and ClamAV detected it as a phishing trojan. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may instruct the user to decrypt a payload, a common tactic to bypass gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://coretry.ru/square?utm_term=francis+left+for+dead PDF link annotation
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90756e6bd1231e606ec25/1625884502809/madison_federalist_paper_10.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee05336d720f75fb649c5b/1626211636696/tales_of_symphonia_leveling_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e91d120cbdad4d3505a527/1625890066649/eukaryotic_cell_meaning_in_bengali.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee075e8443ee2c89346e76/1626212191259/tunovebogogufusoluw.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8cb283836e7a7d617a5a/1626115250809/meaning_of_contradictive.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee0286a0f2ca3483d5f360/1626210951083/delaware_county_pa_deed_search.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e1fc0cbdad4d3502d345/1625874940310/icd_10_code_for_hypovolemic_hyponatremia.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eda52b1374dd6a9a64406c/1626187051260/what_does_the_dandelion_symbolize_in_fahrenheit_451.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee02b777fc8e778b5b3679/1626210999532/11644873872.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e9083737cb9044755eff2d/1625884727629/12614732980.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed546839532c3941bfab2e/1626166376772/sutawenabe.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A643 10444 bytes
SHA-256: a5d60e43c1b1cdd97eb436bacc482f34aa9c1ea83dfdd4868dfbaf7cd687df9c
font_01_sfnt_off0001be0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE0A 18484 bytes
SHA-256: 430c320164a84fb7d48219ba74842aaef86d34a2dc90f85718b7288b77b2a8d5
font_02_sfnt_off0001ee6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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