Malicious PDF — malware analysis report

Static analysis result for SHA-256 b276faea929c6701…

MALICIOUS

PDF

86.9 KB Created: 2021-07-14 00:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a83e0c410ef4d265d547c012c8d0f1a6 SHA-1: fad4a5c2b098e701b4c76583bcc99d66138f0e6a SHA-256: b276faea929c6701462ce5e2d5256b9a700cdd083790557ecd3c6a0217a77d81
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' specifically points to an image lure leading to an SEO redirector, likely for phishing. While no scripts were directly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7022

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/uzX87CUNjRg/square?utm_term=urdu+quiz+questions+and+answers PDF link annotation
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e88405526bc76d6b87032d/1625850885683/3d_watercolor_painting.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edbe2c8e89d93564d18a82/1626193452352/26672631966.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edff9ab0089c62dc41f7e5/1626210202600/stomach_pain_before_pooping.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec903b0e7a3c5fba3e7adb/1626116155842/if_function_between_two_values.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9161f4b4775d04a06627/1626116449441/13317187488.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8279e5eabb22f35ddabc5/1625827230779/invitation_to_treat_example_cases.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee01260229956bd137e832/1626210598753/79484136432.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 4

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f50e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF50E 23120 bytes
SHA-256: 52971c244f331ce1c17be6691930fbce6b343aff71cc901fe57f7e62575ecfcd
font_00_sfnt_off0000c9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C8 16628 bytes
SHA-256: 01ebcb42cdbae6bdf837b3a134610a17a1cfa501a14b53d792bed2c21a0a8637
font_02_sfnt_off00011d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13544 10596 bytes
SHA-256: 3ed3f21ec47ed30ff1652d2b871d8102632f0babb34cbf4cc82942a42db11737

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