Malicious PDF — malware analysis report

Static analysis result for SHA-256 6253a3939fecd149…

MALICIOUS

PDF

79.3 KB Created: 2021-07-16 15:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b85f7113338910c1d883ee2cbf9ecf9c SHA-1: 07da73e4180f06f0f1c8752fe10198b26a910a0a SHA-256: 6253a3939fecd1497b6d43fb67f9136e9d69828807deeadaf6e69211d27b6118
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. A heuristic identified an image lure linking to an SEO redirector, specifically the URL https://drafthe.ru/square?utm_term=faster+than+light+ios, which is likely intended for phishing or malware distribution. No scripts were extracted, but the PDF structure and heuristics strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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.
  • 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://drafthe.ru/square?utm_term=faster+than+light+ios PDF link annotation
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee79bc4d490f672755ae5b/1626241468571/17854035271.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee13439c71001bedf28d19/1626215235599/79963827815.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec99990f7d8d50062dd354/1626118553194/block_calls_from_unidentified_callers.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f074c5ac785a4b5bad60a1/1626371270203/types_of_aggregate.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90577db8bb141bad84ed1/1625884023931/62130562259.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f17129da20a917db52d446/1626435881437/teacup_persian_kittens_for_sale_price.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edeae7e6792c2552bc2164/1626204903498/classic_wow_feral_leveling_talents.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8d0e5a15cb06cdb5e39ca/1625870566374/premeditated_meaning_in_english.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e86e4d419c280ea9acb5c4/1625845325668/animal_farm_by_george_orwell_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f06b3a1c6cf24172e4d859/1626368826645/rollermouse_red_manual.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 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24E 10364 bytes
SHA-256: ad3b9264366bbaacdfd04d23069ae8657c8c1e7865b4e8a32c4b073e908bd4a7
font_01_sfnt_off0000e99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99C 18292 bytes
SHA-256: 45bb5ad4506b30b50de109531d3b7ce949c47f5f3956a72cf6472d15c4d80396
font_02_sfnt_off000117c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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