Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4779effb2ebdfc…

MALICIOUS

PDF

83.3 KB Created: 2021-05-17 23:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c24915314601b1338783455c3c399f2 SHA-1: a4a6ae562acecd1585793b64fbef2fccba889020 SHA-256: dc4779effb2ebdfc9bc1213bf44a3df5f824c02a6d4c75c9ccd8c449bc3cd76c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to a literary summary, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://nipisod.ru/strik?utm_term=yvain+ou+le+chevalier+au+lion+r%25C3%25A9sum%25C3%25A9+court
    • https://static.s123-cdn-static.com/uploads/4463010/normal_5fecd434643bf.pdf
    • https://cdn-cms.f-static.net/uploads/4375887/normal_60459de485a87.pdf
    • https://static.s123-cdn-static.com/uploads/4375696/normal_5fef7fc7d4ae5.pdf
    • https://cdn-cms.f-static.net/uploads/4366654/normal_602a87ab6ae94.pdf
    • http://wotasabe.22web.org/22211791743.pdf
    • https://cdn-cms.f-static.net/uploads/4378834/normal_60197dfdc44cd.pdf
    • https://static.s123-cdn-static.com/uploads/4372377/normal_5ff7da6c0a6f2.pdf
    • https://cdn-cms.f-static.net/uploads/4426422/normal_5fd8804583d30.pdf
    • https://cdn-cms.f-static.net/uploads/4487918/normal_604e2292ae987.pdf
    • https://cdn-cms.f-static.net/uploads/4401540/normal_6044620481a41.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tufitijinexu/5349582957.pdf
    • https://uploads.strikinglycdn.com/files/0acfedbd-de4c-4926-a140-738700d67eaa/fefeja.pdf
    • https://s3.amazonaws.com/nuruvapozixix/what_happens_at_a_rosary_when_someone_dies.pdf
    • http://tamevebuzonufi.epizy.com/antiemetic_drugs.pdf
    • https://s3.amazonaws.com/dekogamik/ablls-_r_sample_report.pdf
    • http://puxetedategekex.epizy.com/words_that_start_with_short_o.pdf
    • https://s3.amazonaws.com/fasomusogapovi/10_uses_of_computer_in_agriculture.pdf
    • https://uploads.strikinglycdn.com/files/4aa84b47-c92c-4a3f-869d-11f0c5048d15/how_to_lock_a_panasonic_inverter_microwave.pdf
    • https://s3.amazonaws.com/xamibudasagas/kiruxofiwofuxijuzem.pdf
    • https://s3.amazonaws.com/sisaxu/13503100242.pdf
    • https://s3.amazonaws.com/wutogugej/java_calculator_app.pdf
    • https://uploads.strikinglycdn.com/files/116221d0-fc61-470c-b50c-0d5a3b19319d/5620703165.pdf
    • https://s3.amazonaws.com/vuraradaso/industrial_wastewater_treatment_methods.pdf
    • https://s3.amazonaws.com/bezorito/fejikamaparo.pdf
    • https://s3.amazonaws.com/nefunupu/angry_birds_game_apk_file.pdf
    • https://uploads.strikinglycdn.com/files/c5246ef5-6c24-4885-ac52-09b95dd68277/47626395651.pdf
    • https://uploads.strikinglycdn.com/files/6f9c3e84-6a67-4fa3-a716-8397c37b84bf/balapataxuvolipukigojo.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001057b.bin
4ed15afc08ae6c515d74192b5fcdaa34e280ed7262296c0639a283f891548bba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1057B 5200 bytes
font_01_sfnt_off000116c0.bin
3e26788f4e1fa69066d90b236ed902b304c3b6142a9878e48e6460517492d88e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116C0 11860 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.