Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f99018fbd1908b2…

MALICIOUS

PDF

81.6 KB Created: 2021-07-19 19:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6dee5847b3a6032c958a53850bce752e SHA-1: ec9e524f6254497aaf638c4a9dc5606da0125fca SHA-256: 7f99018fbd1908b2c7e6f64c3ea3ee87c38e8b1f82209413e2c432f14e3727a4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected by ClamAV as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' and flagged by an ML classifier with high confidence. The presence of an external URI points towards a phishing or malicious download attempt, consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://feedproxy.google.com/~r/sq/ugae/~3/7R6buoffwiA/square?utm_term=dongodu+mp3+songs+download
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8c030b80adc27fb5811df/1625866288452/pink_necked_green_pigeon.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec77c65f604029b9904039/1626109894210/integrated_health_sciences.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8548668ba31612b63e58/1626113352910/yth20k46_owners_manual.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e862183ae4426d43edbd0d/1625842200429/fun_offensive_line_drills.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f5501270ff22042a1bca37/1626689554488/things_that_rhyme_with_feeling.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f5195013915f3af7f9a77d/1626675536277/sons_of_anarchy_subtitles_season_3.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edaf5ed2d00a35b8d1ea97/1626189662762/81617583788.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f381b0ec5ad00cc09276d8/1626571185053/gaxosiwokutanonugigeg.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e861303ae4426d43eda803/1625841969065/jenanudowenesow.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f5469627519501fc2880eb/1626687126329/kutesomuvilejusajokiwu.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_off0000de01.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE01 16792 bytes
font_01_sfnt_off0000f618.bin
2ba0f3577cc0e346216a08d81a9995609df536dc733edafec772890d7e5f9f5f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF618 10672 bytes
font_02_sfnt_off00010e64.bin
7b0ac8ae8821153d2c607325a0f74935429be8ee2601bf4f5b72388a453d40d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E64 16856 bytes