Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd1bc8a2280fed7…

MALICIOUS

PDF

88.7 KB Created: 2021-03-24 07:26:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 57033556bd9b2b7f022bb561a455061e SHA-1: 82890aa2024cd67d4e39d9466f7d62aca6e14e1a SHA-256: 8cd1bc8a2280fed79f8b3772639708ae8ff78081f5896f4032e20b76800e78ba
134 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=lagu+man+ana+di+planetlagu PDF link annotation
    • http://katagonubazi.22web.org/12192365883.pdfIn PDF document text
    • http://duxasavorin.22web.org/sanyo_tv_remote_replacement.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/nizejapimapawanowatetomu.pdfIn PDF document text
    • http://duzixofiwisegi.mygamesonline.org/grade_6_english_textbook_download.pdfIn PDF document text
    • http://kabikuli.iblogger.org/tecnologia_definicin.pdfIn PDF document text
    • http://jezolixepoj.22web.org/gixafegokisajuko.pdfIn PDF document text
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/votagek.pdfIn PDF document text
    • https://naxovemunozi.weebly.com/uploads/1/3/5/9/135958864/31754.pdfIn PDF document text
    • http://nefutekugurenap.mygamesonline.org/os_sete_temperamentos_humanos.pdfIn PDF document text
    • http://lusaxesa.iblogger.org/editable_recipe_template.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/TnlJhqW/glow_hockey_2_player_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kadukugobug/88nyhdk/aim_interim_reporting_requirements.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/hflY9if/cholcystite_alithiasique.pdfIn PDF document text
    • https://zizeximafebofiz.weebly.com/uploads/1/3/4/3/134369397/43e5509256.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://bitujiduruv.myartsonline.com/75528996484.pdfIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_1dd57103da1f4467962e2879c0f4fcce.pdf?index=trueIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_5f61f0c91f9a43589f3c95f4c44de2ad.pdf?index=trueIn PDF document text
    • http://tenemiwufenapek.epizy.com/cuanto_es_1_8_pulgada_en_mm.pdfIn PDF document text
    • http://kuxixatizoxop.epizy.com/veterinary_microbiology_mcqs.pdfIn PDF document text
    • http://gebibem.epizy.com/89448666738.pdfIn PDF document text
    • http://mifefidaleriba.epizy.com/lijawalotegegowofitiw.pdfIn PDF document text
    • http://putiremupupunis.epizy.com/sufaremej.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_833b304215dd4a3cb23ccf04816cc647.pdf?index=trueIn PDF document text
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_d68436788fab46de9d994025d738e953.pdf?index=trueIn PDF document text
    • https://67389751-14cc-4ed3-b660-7ef7239e4cc3.filesusr.com/ugd/bb5584_6d61381d993e47a89bdf1196be2c1eed.pdf?index=trueIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD634 13176 bytes
SHA-256: 634e36b7127e95da88cedc63cfe21532d285330a23902898fc7f7b1261fc3825
font_01_sfnt_off000101ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CE 4720 bytes
SHA-256: d2ac6b136e2a6f9f33a36f67c8adab439acfea3cf676b87e491373330778fdce
font_02_sfnt_off000111c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C3 10772 bytes
SHA-256: e67f8a6222a393faa3017e62b3397fcaaa407d9903145138aaee6791c28e49b3
font_03_sfnt_off0001364a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
font_04_sfnt_off0001444a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1444A 4268 bytes
SHA-256: 6f42b4614c0bef8518c304caca21be8ca5735b2f374b5905440d20d79d1a119e