Malicious PDF — malware analysis report

Static analysis result for SHA-256 b011494da43f7aa0…

MALICIOUS

PDF

101.9 KB Created: 2021-07-21 03:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 86c42b5ff2a512f24f3d83c4e1d56e76 SHA-1: 327c4a8fac8e25c8f19ddf54fad20f20bc409bb9 SHA-256: b011494da43f7aa077377ebe87bce3f47e3091c2fecbdb3ca250f47ebdc3c204
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it uses an image lure linking to an SEO redirector for a 'free-download phishing' scheme. Although the document body is heavily obfuscated and unreadable, the presence of external URIs and the nature of the heuristics strongly suggest a phishing attempt designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9368

Heuristics 5

  • 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.
  • 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/~3/4P1vZUbBa90/square?utm_term=the+listener%27s+bible PDF link annotation
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e906bcdc37083541b7a556/1625884348878/94207134362.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e903eccc7c08645925ba4c/1625883628631/9278523007.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec952e69d4b63361487fa2/1626117422560/youngs_chinese_food_carryout.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8ec465fa2eb14b9091531/1625877574542/97398376233.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2187f4b68c137e68ef739/1626478719853/juperuzivadugadidov.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed4709af55617121240c77/1626162954067/nest_thermostat_user_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f4905325edf1230667c7e4/1626640467868/butobit.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f6588cd7d722325d771f84/1626757260120/the_forest_trophy_list.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_off00012d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3D 17896 bytes
SHA-256: 0d34a6387b42683381b294d1070caae8c8816647e43ccdae2f12ba061b37611e
font_01_sfnt_off00015ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BA5 10060 bytes
SHA-256: bccdfebe7713ec8e195a881541bcb9a44b2c4f99532374f2759e6a149a0ec64f
font_02_sfnt_off000171fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.