Malicious PDF — malware analysis report

Static analysis result for SHA-256 b710d8cfb955f640…

MALICIOUS

PDF

82.3 KB Created: 2021-07-23 00:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e3f45a7b76f4e4b6096941d97854ffc SHA-1: 15605bf4ab5fe9c13c7cc5197daaa2753fba9ee7 SHA-256: b710d8cfb955f640b90a07c952bcb646b3c09c518ee34892a0d64dd3d52bb25f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by a ClamAV signature and an ML classifier. It contains embedded URLs, one of which is flagged as potentially malicious. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of embedded URLs suggests an attempt to redirect the user to a malicious site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/X6hrLWyzjlw/square?utm_term=crunches+with+legs+raised
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edda39d9d5ad70ebd1f4cf/1626200634009/the_lottery_ticket_by_anton_chekhov_conflict.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f4a54225edf1230668f7e2/1626645826768/bunuzonisukojasojexatun.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7b686efb14d11220f4872/1625798278805/57295577014.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1afa69e987571aa396d7c/1626451878755/list_of_laws_signed_by_president.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f8a4cf1c69b90b7a7c2b6c/1626907855329/92407035610.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f2d363a9adb72803a08b11/1626526563110/zewazolubaxojupijomozin.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f1d48971719b7e36b80a27/1626461321515/duxejef.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e89741a604a5574a7f059b/1625855810028/hot_dog_cart_catering_near_me.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f251e91db272198f8cc30c/1626493418299/hit_the_deck.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edb4a58d40d36f0086374d/1626191014086/7735876987.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9d704f2b1c51afa62532/1626119536788/marx_wages_price_and_profit.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f01498c57e07264c21ce4c/1626346648730/78713537160.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f8629f86d1dd7b304c14f1/1626890911740/92988584688.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f38269d9389f5e809049f8/1626571370205/48959198131.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f2b1a47e0b4d5f6b1388e2/1626517924599/ranami.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f7f21cd0dde27ef577fec8/1626862108582/variance_of_first_n_natural_number_is.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0e83821e37b5b0f37a8b5/1626400824381/a_first_course_in_integral_equations_solutions_manual_free.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f589c29ee5897bffbd069c/1626704322761/how_many_seconds_are_in_3_hours.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eca3ede4ca3800a11acadf/1626121198039/piluposu.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_off0000e05c.bin
27fa3aa593ab0eaf792fed0e9c9cb5522d789c4965fa99ea298f4b934b664577		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE05C 16260 bytes
font_01_sfnt_off00010a9a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9A 16792 bytes
font_02_sfnt_off000122b1.bin
bc56679e2da818f9ec72cd629e28792312c0b2606d86ed12e6fc5b7473e8dced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122B1 10744 bytes

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