Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6b3282a3838da9…

MALICIOUS

PDF

82.4 KB Created: 2021-07-22 02:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 402b562bdd0f87df59f64fe9fa01e373 SHA-1: a9b798923a2770415f71dd7e3eb5b1610ec1615b SHA-256: 0a6b3282a3838da9398ca8a38ed7e2b589e59b51677fb51a0ca42cab94995237
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. A critical heuristic detected it as Pdf.Phishing.Trojan. The embedded URL, https://crysiq.ru/square?utm_term=xnxx+download+in+mobile, is a primary indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to this malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/square?utm_term=xnxx+download+in+mobile
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f46bb66167905317e5c7ac/1626631094500/what_three_chemical_elements_are_the_building_blocks_of_carbohydrates.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8f880f229ba2ea835653d/1625880704248/shadow_fight_2_android_club.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f8a7bcf6b38207f735e211/1626908604508/kekafiju.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f58acd2117d935efc0a4f6/1626704589563/how_to_digitally_sign_a_on_mobile.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edb4eaa5c02c6ff4dcb369/1626191082735/35127348559.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e8752dabf27235516619/1625876597551/66140090584.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ede84b8e89d93564d5eecb/1626204235660/sunday_good_morning_wishes_for_friends.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f44b4fbf9212646c4430fa/1626622799854/2481104825.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f829e11d980e224d411b8c/1626876385523/least_common_multiple_of_18_and_27.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f196cbda1ea5774fff3d2b/1626445515302/vibopirebokerujuna.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f473bd1d350707422a5d4d/1626633149344/16175526400.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee7b5839b82603386dba6d/1626241880580/56793578106.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f8af81d214234a65e4dee9/1626910593626/print_protecteds.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f89dd0b640d10afb0191ea/1626906064750/how_to_increase_oxygen_saturation_naturally.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2e96d81f38b205881597b/1626532206071/39330600661.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eddb151f6a9512286f7c8e/1626200853775/rendition_of_a_song.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee6886f72ce0266e1284dc/1626237062369/romance_is_overrated.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3beb029712869f06ba03c/1626586800455/gudajisibokoruf.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0de9e4bb49071de15713b/1626398367008/sdet_interview_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f13a3c93f2b300380edd05/1626421820239/sosufazalogozojame.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f4bb711ad9bf1c32c43f5f/1626651505726/brown_churchill_complex_variables_solutions_9th_edition.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_off0000e2c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C6 16792 bytes
font_01_sfnt_off0000fadd.bin
bc8b7e1596d22a5c04e285f21f2a942e51787cbe32145d5eea4eb1a614ff9e5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFADD 10380 bytes
font_02_sfnt_off00011240.bin
a6b122c38d55c755d1abc2d088b802640cd395ae072d4fa525ff43366eee7775		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11240 16424 bytes

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