Malicious PDF — malware analysis report

Static analysis result for SHA-256 04528d0bd6f63389…

MALICIOUS

PDF

148.2 KB Created: 2021-03-31 20:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1b260791539b153a7a866ae9fb1a33bf SHA-1: 9e4d152472427c4afa88eaf45b037651333fad27 SHA-256: 04528d0bd6f633899bcdfa39e5470c1eeabb4c99e428b714f381e4af652a7ad3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=shark+nv500+manual PDF link annotation
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/8ae855b485ad.pdfIn PDF document text
    • https://cdn.sqhk.co/duvetezoje/efggqFt/15703205240.pdfIn PDF document text
    • https://cdn.sqhk.co/vekunego/gjifDJk/imdb_movies_2018_and_2019.pdfIn PDF document text
    • https://kafijojiwagovi.weebly.com/uploads/1/3/5/3/135387916/4658013.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/gjjeGia/17935707820.pdfIn PDF document text
    • https://retibome.weebly.com/uploads/1/3/4/6/134680472/zekap_pejejigewomi_lokugezifori_gegigiz.pdfIn PDF document text
    • https://talipugetajizan.weebly.com/uploads/1/3/4/8/134862074/dumatupoda.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunaropiz/givZhiu/tirizotina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476133/normal_5fe632d012831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489587/normal_601319889dbe5.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxogatuv/jfiahcg/98398688635.pdfIn PDF document text
    • https://fimopokiwuzik.weebly.com/uploads/1/3/4/7/134736862/f617da219.pdfIn PDF document text
    • https://funefazadoma.weebly.com/uploads/1/3/4/6/134648765/7c1590c0b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://ziboporo.epizy.com/samsung_galaxy_s3_gt-_i9300_bootloader.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/canon_mp240_windows_10.pdfIn PDF document text
    • http://volowunodevikel.rf.gd/xefudefamawiselemupodo.pdfIn PDF document text
    • http://mimumugemefes.epizy.com/78627083182.pdfIn PDF document text
    • http://gikifipililiza.epizy.com/how_do_you_say_chrysanthemums_in_portuguese.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/love_me_if_you_dare_novel.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/adobe_air_android_9.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C071 5240 bytes
SHA-256: bdabcf2bff9dc4e7cc6128392b20f8ab8f48b7592ae293a40456078cea78d6c2
font_01_sfnt_off0001d21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D21E 21552 bytes
SHA-256: 0286332f431f4606c2e757be1850f079b713f464d08b24442aa7bb4bee281503
font_02_sfnt_off0001f39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F39A 2048 bytes
SHA-256: 5bbfb71e7e79db7713d2dca3d61a529cd6bdf2162d19a91745b024a6fee9cfc1
font_03_sfnt_off0001fc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC77 15900 bytes
SHA-256: 5ba65bcfe55b2cfad1a67f6a36454ed710d58f1dca613e7ce07225c70eac6d0f
font_04_sfnt_off00022b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22B87 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501