Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd2f638f6994330…

MALICIOUS

PDF

124.5 KB Created: 2021-07-20 06:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c8698bea845069d51264f02f07769218 SHA-1: ac12086b94a753bbc5e743f9fd03eaa0576cbf8d SHA-256: ecd2f638f6994330b23fc82ac3a332b078f604e70d614fe8f5c245008b456638
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a PDF phishing trojan. While no scripts were extracted, the presence of embedded URLs suggests an attempt to redirect the user to malicious content. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4006

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/rCno-htTzZk/square?utm_term=name+of+passover+meal PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f4b4119c7c9f0ea9aa0072/1626649617222/moving_backgrounds_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f05f88d8e413227d1fe095/1626365832690/unchecked_population_growth_and_its_impact_on_the_economy.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f366b56167905317dbe430/1626564277246/66174976359.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e81c4323621b4743e6798e/1625824323947/bypass_for_pubg_mobile.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e84fecda5f466f286f784f/1625837548673/easy_goulash_with_corn.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A3A 10268 bytes
SHA-256: e4ad3aa4d6f0d3547a5575a89dba85e9345c15c35d6c98a3c0111f088bbc50db
font_01_sfnt_off0001815b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1815B 18676 bytes
SHA-256: 08c8d0088eec603d8b41f4afb67ffb41336194bbb3fd2f4c2686da1b6839d73a
font_02_sfnt_off00019ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001b80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B80F 17776 bytes
SHA-256: 4fb032b61740bddf58ec932afe5cced873c4108ddf88c3a5f2486cf752199d4c