Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a10dbc04c8af3d5…

MALICIOUS

PDF

75.7 KB Created: 2021-07-20 16:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70143a1d6677af742337b4294d96f661 SHA-1: 9b2169716909d97dde2ea9bcd55ed2905fe86dd7 SHA-256: 6a10dbc04c8af3d52026fb3e97530c3e913a616a6715abf467e2b32b1b8b3dc9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically one pointing to a feedproxy service and others to static Squarespace PDFs, suggests a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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/jEScUJLm1bs/square?utm_term=4+pics+1+word+answers+by+level
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec91bfbcf8be39b50665e2/1626116543919/bemovitujefedoz.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0269dd7775704165581c3/1626351261537/stress_and_myocardial_infarction.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed93754325c5343bb8b8ba/1626182517673/vovomosiva.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edd0c51c6c1a61d52389ea/1626198213385/tibatebowutusaluvuge.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee0aaa2485902f3e6f2e13/1626213035064/sec_61_of_evidence_act.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f625a1a22c811cd22451c6/1626744225612/how_many_bottles_is_70_ounces_of_water.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efd986c0b35f4fb3d960d5/1626331526789/classic_wow_server_transfer_cost.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0daf53710375a26a3700c/1626397429382/first_goal_of_psychology.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f363771434f63547253d30/1626563447554/wulovuvofo.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e812507d3b385c94b7ab49/1625821776808/291752243.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c73a.bin
4c347d374b45096570d0cd1010c3d9ec6eb433a3c2a1c433ce3beb997474ad32
pdf-font-stream PDF embedded font (sfnt) at offset 0xC73A 10848 bytes
font_01_sfnt_off0000e049.bin
e742263ebd5eadfaac88d3c3f3734beae8fb9b7cde270a230d9e9a91e7a56c35
pdf-font-stream PDF embedded font (sfnt) at offset 0xE049 16172 bytes
font_02_sfnt_off00010a63.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A63 16792 bytes