Malicious PDF — malware analysis report

Static analysis result for SHA-256 1808361a6ba26e36…

MALICIOUS

PDF

71.9 KB Created: 2021-03-16 08:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f23e60cdba43e9a22055bd77e32f695 SHA-1: 9ad905daaa96569a255b5ebfe4a0d8148526d291 SHA-256: 1808361a6ba26e3614bbccc6f2e8c33168a9bb7b890f99e46dda3d564eb91e61
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://lozipotod.ru/wix?keyword=ib+sports+exercise+and+health+science+guide
    • https://static.s123-cdn-static.com/uploads/4444117/normal_60095c0acfb43.pdf
    • https://cdn-cms.f-static.net/uploads/4420602/normal_601f134f5cfde.pdf
    • https://cdn-cms.f-static.net/uploads/4427509/normal_5fd90b57e51c3.pdf
    • http://rostov-mobile-doctor.ru/gloomhaven_cragheart_perks1l839.pdf
    • http://mxbur.fun/video_lagu_armada_band_harusnya_akupjzs6.pdf
    • http://shop-kid-toys.online/497310216633cqt9.pdf
    • https://cdn-cms.f-static.net/uploads/4403274/normal_601086e731e7c.pdf
    • http://zoneeuro.pro/crop_guide_stardew_valleynezp0.pdf
    • http://bcipreactivaperu.com/falilejakidowosezabnip64.pdf
    • http://covid-19online.site/888141444842k04g.pdf
    • https://cdn-cms.f-static.net/uploads/4403688/normal_604712ccb029f.pdf
    • http://ekzo-fruit.ru/matematicas_5_primaria_ejercicios_multiplos_y_divisoresc8xwh.pdf
    • http://newyearshop.site/conjunction_and_but_or_worksheetsw72ba.pdf
    • http://getchambre.xyz/how_much_do_hunter_douglas_blinds_cost9alxs.pdf
    • http://epaytds.xyz/reaper_pickaxe_fortnite_codexmys2.pdf
    • https://cdn-cms.f-static.net/uploads/4388157/normal_5fd7ed07ccf3f.pdf
    • https://cdn-cms.f-static.net/uploads/4420765/normal_5fda2958236db.pdf
    • https://cdn-cms.f-static.net/uploads/4501645/normal_60323bdee86d5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/87af4088-6bb0-4856-b6e7-ff2cf595173d/wirolejovas.pdf
    • https://uploads.strikinglycdn.com/files/c5cee557-04c4-4f2e-94a1-4230ff8a0b32/fukuxefotaroworenoxatu.pdf
    • https://s3.amazonaws.com/saxefi/tokidolibelike.pdf
    • https://s3.amazonaws.com/xakusineba/vudurotakolivi.pdf
    • https://s3.amazonaws.com/sefukirexuwekij/zizakowom.pdf
    • https://s3.amazonaws.com/xipavir/jevasetaxiri.pdf
    • https://uploads.strikinglycdn.com/files/94aea594-0da1-443f-ab96-2b333285e072/how_to_wind_a_bobbin_on_a_kenmore_ultra_stitch_12.pdf
    • https://s3.amazonaws.com/kuxuxemu/wuvomu.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_off0000d847.bin
7a86dcf1c19a99e08bbf23a1a23573aa6809b0286c07c46eb04b134e6653d5cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD847 5480 bytes
font_01_sfnt_off0000eae1.bin
878577a6807f5275d3d38c8f7c7adf65471b913583c7e8fa74a6fbff6082cf3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE1 12276 bytes

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