Malicious PDF — malware analysis report

Static analysis result for SHA-256 939b06c651134aa8…

MALICIOUS

PDF

114.4 KB Created: 2021-07-14 04:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1a27eede8604c7d2b55051aa5fe20d13 SHA-1: e8dc8f083b7d58a45acf10b0b730479605cf4746 SHA-256: 939b06c651134aa82c9bfa958b0b9ac50dadfeeb63769b9ae99635cfab67fd86
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is detected as a phishing trojan by ClamAV. It contains heuristics indicating a lure to enable macros or editing, a common tactic for malware droppers. The embedded URL, while flagged as confirmed benign, is associated with a redirector, suggesting a potential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2606

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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://feedproxy.google.com/~r/sq/ugae/~3/S-4CHg4Qmwo/square?utm_term=stagflation+meaning+in+bengali PDF link annotation
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edde9fa9aa746350cbe74b/1626201759152/another_word_for_coming_to_an_agreement.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8ffe973f9128ac6bca57/1626116094621/namagijegemav.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e82a319ebc0053f319bf9a/1625827889845/sonic_dimensions_fan_game_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed99b4a5c02c6ff4da16f8/1626184116853/jquery_checked_selector.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e0b1309bd63f3d82a7fb/1625874609372/calculus_a_complete_course_7th_edition_solutions.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001304c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1304C 10504 bytes
SHA-256: f1010fdb30609fb9df6008c67db5a985fed345e9826b3620d92eb3f08ace7cc0
font_01_sfnt_off00014827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14827 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16038 17364 bytes
SHA-256: 2dc07ec103e43455f22b9edcca4dee397602184d955207193707116ddaba7a3b
font_03_sfnt_off00017a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A6F 21592 bytes
SHA-256: f225e1df10f371be3beba5455fa128bf479ccfee797578f4021132ca193e1368
font_04_sfnt_off0001b0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0C7 2892 bytes
SHA-256: 662ab4079e45a4023bb4ad54208346be219fcd7cf7c6c3a17ea1fdf1892f99a7

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