Malicious PDF — malware analysis report

Static analysis result for SHA-256 a887d170743d47e8…

MALICIOUS

PDF

88.6 KB Created: 2021-03-12 19:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 186e6488021aeb5f89a81ab6f2331360 SHA-1: 12b7070aac3853493851960ad3010ceddd96cf45 SHA-256: a887d170743d47e885c4091285ce64cb4606430dc7585420d6e62647db5b8120
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file. Although no scripts were explicitly extracted, the presence of embedded URLs within a PDF, combined with heuristic detections, suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/aws?utm_term=%25D0%25B8%25D0%25B1%25D0%25BF+apc+back-ups+pro+br1500gi PDF link annotation
    • http://kavelizopepi.mywebcommunity.org/zovimipi.pdfIn PDF document text
    • https://cdn.sqhk.co/nunamarajop/iqiihbs/anjali_movie_song_bgm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452398/normal_5fc813b9339b1.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/sikosewer.pdfIn PDF document text
    • https://cdn.sqhk.co/naxisedomak/giFOhcN/online_slots_free_spins_no_deposit_required.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/512640646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482617/normal_60267fc84ff1a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8559e230-67e9-4002-ae94-5738d8aaca5c/msi_z97-g45_gaming_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/robebesikadidus.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/canticle_of_the_turning_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/magazine_cover_page_design_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/speed_queen_commercial_washer_dealer_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5898c40-d746-4792-8e71-2ae88c19e04b/online_floor_plan_generator_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77c98779-b16f-415d-a581-ae4d1bf9d6a5/stephen_king_book_list.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/japan_guide_kansai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c5d7a7-59ac-49c8-a54d-72ea2f6cdb03/kirorasevibulewufuxot.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/nebupoxomupuvakunidixo.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/furafedufufujulilulegadun.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/11215100189.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/why_michael_corleone_kill_fredo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012846.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12846 24252 bytes
SHA-256: a68a39d7596a0874013bd840c48c5b82e0e742d696ccf12d185f26ebb47756eb
font_00_sfnt_off0000e507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE507 5808 bytes
SHA-256: ebc3d36c97c6b50f8f8f756c871b2ff5457563f20477909014c3f653797a84d5
font_01_sfnt_off0000f900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF900 15176 bytes
SHA-256: 49c0fbe3d9de9d3803b24a4cbdeb36891d1c891bf9052b699e3d252a6d009fff

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