Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a822cd62958889…

MALICIOUS

PDF

78.6 KB Created: 2021-03-14 00:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 30706c1a6d608eed21f7732284a215f4 SHA-1: 59e34dff0de5b1114f4aac64f7ac6b75b97ea62b SHA-256: c0a822cd629588890a5611d6572077d0f622863b8dc5aad1588638ec53595c44
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm on disposable hosting. The document body, though heavily obfuscated, suggests a lure related to a 'Harbor breeze ceiling fan manual'. The presence of numerous external URLs, including one pointing to 'nipisod.ru', strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/award?keyword=harbor+breeze+ceiling+fan+manual+pdf PDF link annotation
    • http://rexevivejegox.scienceontheweb.net/272561193.pdfIn PDF document text
    • http://mexawolin.medianewsonline.com/pdf_advertising_media.pdfIn PDF document text
    • http://rokamik.iblogger.org/73068398322.pdfIn PDF document text
    • http://budozezofezuje.iblogger.org/losodojusibavepotexelibu.pdfIn PDF document text
    • http://pisodaseveporow.22web.org/addition_worksheets_for_kindergarten_1-_20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/resisuna/limewixanuperokurirupako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b21d0a6-8e20-4d43-9e9a-b61ceca3532a/29665760197.pdfIn PDF document text
    • http://viwesusogura.rf.gd/17026733916.pdfIn PDF document text
    • http://zekovulelopur.epizy.com/guxav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab3d9b4-8e53-4521-90bb-de24d1bfbebc/brother_mfc-j825dw_printer_wont_print_black.pdfIn PDF document text
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_bf9f0b7cbd154167972342dda833a208.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_bd4420e73c1c475aae802c5b215a9014.pdf?index=trueIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_346fa5cbaed34c68be7cdba05a9dbd44.pdf?index=trueIn PDF document text
    • http://nosofaxiwobud.epizy.com/abematv_apk.pdfIn PDF document text
    • http://sitotozip.rf.gd/vcenter_server_appliance_install_guide.pdfIn PDF document text
    • http://gewopebij.epizy.com/58037653466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4574c8b4-554f-4b82-9ea1-e17a65e8c372/the_end_of_the_world_song_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/batowom.pdfIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_8b1a62f68b794fbdb5065c22a2a3622d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1eea28a-dc55-4bc7-aac1-750f3346f7c8/dlink_dir_605l_router_setup.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/bigofilusupusov.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/70910863797.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE779 3800 bytes
SHA-256: cb455af8ef3617bbc6778bd73db14ab76f05964cbadb7ce2caf19a8f32bf7c15
font_01_sfnt_off0000f501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF501 5448 bytes
SHA-256: d9ded505ef9faaf14bcd18776c2f46427d1a997e4f83bbb314694b1a23ec6c0c
font_02_sfnt_off00010777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10777 10808 bytes
SHA-256: 82aff9e4c85b34a30bd5bc36004590b54c24db48d8dd786400a247cd6763cd75

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