Malicious PDF — malware analysis report

Static analysis result for SHA-256 5299913c6bc6aacc…

MALICIOUS

PDF

84.5 KB Created: 2021-04-05 14:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 465569f263bcd32a4cb8ea23d7f7971f SHA-1: 779263840cd40ab3a80b29cd3bc7a68282a38013 SHA-256: 5299913c6bc6aacceaa2d82f9ea2e81a2bd2f65ac38843b4ad3a7c7214e9c1c9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://jottigo.ru/award?keyword=astm+a588+pdf PDF link annotation
    • https://giruwikepu.weebly.com/uploads/1/3/4/4/134464081/lomuz_feguf_rorumapokul_xiraxeb.pdfIn PDF document text
    • http://besuxiju.22web.org/beautiful_hd_wallpapers_for_android_phones.pdfIn PDF document text
    • http://jojenulowivot.22web.org/71043991365.pdfIn PDF document text
    • https://cdn.sqhk.co/migawudewiw/jC2gijc/pinkfong_abc_phonics_full.pdfIn PDF document text
    • http://wolorarozuxa.22web.org/pesonuzapugirugajodak.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/AhgjhWB/99409024701.pdfIn PDF document text
    • http://renijulemigato.iblogger.org/19453296300.pdfIn PDF document text
    • https://cdn.sqhk.co/nizufalagef/Qfhdggh/nedavijepazuzojagupisab.pdfIn PDF document text
    • https://famutogerene.weebly.com/uploads/1/3/4/6/134688643/murukukofaremam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415530/normal_6043ff4710697.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/CQibgcX/fetosabuzedisiwis.pdfIn PDF document text
    • https://sonujeti.weebly.com/uploads/1/3/0/9/130969686/49e4d0c69ee6afe.pdfIn PDF document text
    • http://vofufime.mypressonline.com/which_one_of_the_following_systems_is_an_example_of_a_management_information_system.pdfIn PDF document text
    • https://cdn.sqhk.co/lemijexo/X1iaKjf/world_news_fm_radio_station.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452861/normal_5fcf165388a77.pdfIn PDF document text
    • https://nonejekorozu.weebly.com/uploads/1/3/4/1/134108542/fcceca759dc8ddd.pdfIn PDF document text
    • http://sudoniwitexife.22web.org/vunumixipujiseraminagiz.pdfIn PDF document text
    • https://gafonubizaragu.weebly.com/uploads/1/3/5/3/135346264/zolugudebo-nunulurimoxini-kazifubuwokuv-xinimobez.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://wiwosotu.myartsonline.com/naming_organic_compounds_with_functional_groups_practice.pdfIn PDF document text
    • http://mojogoralil.onlinewebshop.net/28147251300.pdfIn PDF document text
    • http://wenares.myartsonline.com/arduino_projects_ideas.pdfIn PDF document text
    • http://pifetipopazemex.rf.gd/9453870948.pdfIn PDF document text
    • http://naditoliwinudev.epizy.com/axial_and_centrifugal_compressor.pdfIn PDF document text
    • http://dinoxisajuz.rf.gd/tajugipupinew.pdfIn PDF document text
    • http://gavitum.rf.gd/alchymista_kniha.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/guide_post_hotel_low_moor_bradford.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_off00010087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10087 4772 bytes
SHA-256: 25506f53089b534e91cbf2b3d226828e11d4e334566d11d82a9c9618c7253d6c
font_01_sfnt_off000110b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B5 11060 bytes
SHA-256: 263eb64e469693b8f539472c6203532f12125a890a4f7d7e2bbed5bec372f636
font_02_sfnt_off0001366c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e