Malicious PDF — malware analysis report

Static analysis result for SHA-256 36eef748d051877c…

MALICIOUS

PDF

92.4 KB Created: 2021-03-28 09:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 922387d94b3e0e2a0a2f19c243a213fe SHA-1: 1d31a7fe58f214d5ddc18b743c44c99179599087 SHA-256: 36eef748d051877c0f3f3117615797c9fab733179a1171eb6f0a8e62be77c48f
166 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 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://lozipotod.ru/strik?utm_term=juegos+de+cinema+panic+2+y8 PDF link annotation
    • http://givimemaregudum.sportsontheweb.net/ep152_form_certification_of_employment.pdfIn PDF document text
    • https://mawoluzapulumar.weebly.com/uploads/1/3/6/0/136082117/3c007b812.pdfIn PDF document text
    • https://cdn.sqhk.co/fixosotefe/bggmsOP/1000_words_ffx_2_spotify.pdfIn PDF document text
    • http://immortal-sho.club/jomababimowulf32.pdfIn PDF document text
    • http://bufibinokurun.scienceontheweb.net/planets_in_the_solar_system.pdfIn PDF document text
    • http://fagogit.sportsontheweb.net/45333937769.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/fib4kgj/stauff_pipe_clamp_3d_model.pdfIn PDF document text
    • https://nekitunanozot.weebly.com/uploads/1/3/5/3/135346928/5482394.pdfIn PDF document text
    • http://bexukavinawexov.mygamesonline.org/sybex_ccna_200_125_free_download.pdfIn PDF document text
    • http://instapriz24.site/big_head_soccer_ball_kick_ball_gamesdola5.pdfIn PDF document text
    • https://lisokafi.weebly.com/uploads/1/3/4/6/134694643/kutodazofukuwut-bejaseguwu-pajasojamexol.pdfIn PDF document text
    • https://cdn.sqhk.co/fasixazijaz/chbmlia/talking_tom_gold_run_download_windows.pdfIn PDF document text
    • https://deluwibenarut.weebly.com/uploads/1/3/1/3/131382693/4a4667f5447.pdfIn PDF document text
    • http://questotzvezd.space/yahtzee_score_sheets_free_printable3xpdc.pdfIn PDF document text
    • http://com-login8.xyz/hp_deskjet_3050a_all_in_one_j611_series_driver_free_downloadjtkfw.pdfIn PDF document text
    • http://zonokiwuwagupu.getenjoyment.net/solucion_hipertonica_edema_cerebral.pdfIn PDF document text
    • https://cdn.sqhk.co/labojime/fjhGMO5/putekij.pdfIn PDF document text
    • http://xabudumame.mypressonline.com/vazuremexikekobibogoka.pdfIn PDF document text
    • https://nujuwededewomoj.weebly.com/uploads/1/3/4/3/134305400/nisemi-keviwipebavu-nagowejati.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/19169688-f110-4bff-8b26-b846406f1ee1/worogow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69846a6d-4750-45a2-bdb4-598c6f36f89d/bank_exam_aptitude_questions_and_answers.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/podobibufupesivif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23cd0a16-4fb2-47ef-ae39-3b6e5d1cc324/90775602787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8454c752-e9d3-4f2a-bbc5-448d5445d56c/what_do_double_numbers_mean_spiritually.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD2 5684 bytes
SHA-256: 5676c953f04a01c518a4b452fef901cc918519c2f6c46af8bf412bc43f39e2b1
font_01_sfnt_off00011017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11017 6396 bytes
SHA-256: e5bd7398f81f8d5698bb97189754705536adbca336efda1d63d1e488da80b1ac
font_02_sfnt_off000120f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F3 13052 bytes
SHA-256: 9a2ec0fd00bb43ac7c1c18010b2dc20e6d83bf61a1018e87b99d7cf0c1e34a9d
font_03_sfnt_off000149cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149CF 16932 bytes
SHA-256: 21d728de36525eb03d4543aad06efab3040522dc6587c960a368ad44c4c2b18a