Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e752cb6059b98c1…

MALICIOUS

PDF

95.8 KB Created: 2021-03-07 06:20:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1ede292856aa2206d80f7b6535ea4eb1 SHA-1: 9247cd3eefbe886ddc56e3d8d7783c0ca51c404a SHA-256: 2e752cb6059b98c187b536b2060d6f4687e7e3df326d183ed9fc0ce1cdef03a4
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=matching+parabolas+to+equations+worksheet+answers PDF link annotation
    • http://vedivux.mygamesonline.org/natirenidupojinin.pdfIn PDF document text
    • https://danabemove.weebly.com/uploads/1/3/0/7/130776083/660077.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/fabevuniranukizojo.pdfIn PDF document text
    • http://kokolonesafu.getenjoyment.net/ascii_table_hex_a0.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/11298839747.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/nuvebigolegeriso.pdfIn PDF document text
    • http://ramifapufebi.scienceontheweb.net/piwabuwijutiwusoru.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/the_unwanteds_movie_cast.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/tulilufewumagarapi.pdfIn PDF document text
    • https://nojasiputijaze.weebly.com/uploads/1/3/4/8/134869787/mizikavogipe-pafavinemono-mazejesulono.pdfIn PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/narazofimokisasi.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/tobajepun.pdfIn PDF document text
    • http://zakukat.iblogger.org/benetuz.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/oracle_pl_sql_string_concatenation_operator.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/behringer_xenyx_502_usb_manual.pdfIn PDF document text
    • http://wudazex.sportsontheweb.net/dog_symbolism_in_wuthering_heights.pdfIn PDF document text
    • http://lidedapomegila.iblogger.org/esc_guidelines_2019_acute_coronary_syndrome.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sarowagilujet.rf.gd/77617242003.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/dumuripusuvavovogatizodud.pdfIn PDF document text
    • http://vutuzirowu.rf.gd/9759416601.pdfIn PDF document text
    • http://barirenuvekesup.epizy.com/excel_vba_find_and_replace_in_range.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13435 5624 bytes
SHA-256: fbcf6f3cd7f12be6978daa16f5465f668c122e9cd4b198b17f04d89d0a1b6dd8
font_01_sfnt_off00014765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14765 13292 bytes
SHA-256: c75e4ae8ba58921bfd9b67ff2d24b9b68b277b6006e82de6a8c3053511018389

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