Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6473c108d4a4354…

MALICIOUS

PDF

75.6 KB Created: 2021-03-27 23:37:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 888fd177f0bca14e77fa13cdf610db05 SHA-1: 96798addc4981f5ce58175c56b7d44a3e215a597 SHA-256: a6473c108d4a43545ae2603b119cccf1d94a7b850220a9b1bb1c5efedf76fc22
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Skyrim mods' and directs the user to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/aws?utm_term=how+to+apply+skyrim+mods+xbox+one
    • https://static.s123-cdn-static.com/uploads/4423166/normal_60061c8654a8e.pdf
    • https://cdn-cms.f-static.net/uploads/4467043/normal_60158b21d5fb0.pdf
    • https://static.s123-cdn-static.com/uploads/4445750/normal_5fc6fe972e6fc.pdf
    • https://cdn-cms.f-static.net/uploads/4426062/normal_60270d18384f8.pdf
    • https://cdn-cms.f-static.net/uploads/4421352/normal_60526752f04cf.pdf
    • https://cdn-cms.f-static.net/uploads/4486552/normal_601b61e83d47c.pdf
    • https://cdn.sqhk.co/bomoxale/ggujhgd/college_basketball_time_periods.pdf
    • https://cdn-cms.f-static.net/uploads/4461497/normal_603f32b1291d8.pdf
    • https://cdn.sqhk.co/fobonelaga/3RgcbYY/home_design_decor_shopping.pdf
    • https://cdn.sqhk.co/dejuxafe/gjjfige/iss_live_hd_earth_viewing_apk.pdf
    • https://cdn.sqhk.co/lizupasepafu/icRjh8u/manaxobotokizanomakimu.pdf
    • https://cdn.sqhk.co/datimemovuko/SbkL1gd/18675384003.pdf
    • https://cdn-cms.f-static.net/uploads/4462727/normal_6058b1783b6df.pdf
    • https://cdn-cms.f-static.net/uploads/4389104/normal_6059d876d472f.pdf
    • https://static.s123-cdn-static.com/uploads/4455405/normal_5fdd7851f02a1.pdf
    • https://cdn.sqhk.co/keridola/jigjggd/c_check_compiler.pdf
    • https://cdn.sqhk.co/galudubujuwa/bicYLbu/monty_python_silly_walk_song_lyrics.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b8348625-f2a5-44fa-80cf-66e6cca3391c/how_to_pair_firestick_remote_to_panasonic_tv.pdf
    • https://uploads.strikinglycdn.com/files/cff7169a-4f66-4e9c-8b14-a23aea8e8a97/calendar_girl_audrey_carlan_movie.pdf
    • https://uploads.strikinglycdn.com/files/7e9ab0e3-b917-4190-878e-368007685375/begovifowofubedusezesoz.pdf
    • https://uploads.strikinglycdn.com/files/3c067898-ea58-401e-9ba1-039c2efafcfb/1896699846.pdf
    • https://uploads.strikinglycdn.com/files/4d73c7ef-69ee-46f3-a31f-933906969e86/f3_smart_watch_bracelet_user_manual.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_off0000e9a0.bin
dc689e304a56ea47a04015719520b6751245c9d484d6dde48b7dfccda84a9ed3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A0 5532 bytes
font_01_sfnt_off0000fc6b.bin
30a74decf84a840d21c84263ecf8d61ee49f863fe6fca0d5e04e8e7702d8cbdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6B 10720 bytes

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