Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84fb6bcd3c52542…

MALICIOUS

PDF

80.2 KB Created: 2021-03-04 20:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3263662f8dde16215c17bbd58fcfd478 SHA-1: 4b57748f97d84cf200df750f01622b919fa81808 SHA-256: c84fb6bcd3c52542fe6b25580f253e7055312fd067ec001f764aa146614dea78
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the PDF and its URLs point towards a common phishing or malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/123?utm_term=el+coronel+no+tiene+pdf PDF link annotation
    • http://pedagodogiko.getenjoyment.net/how_to_set_up_a_paraffin_heater.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/cFgfigX/50160946619.pdfIn PDF document text
    • http://wukosemat.22web.org/bandit_queen_full_movie_hd_720p.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/geogdib/22501614081.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/adidas_apple_watch_band_38mm.pdfIn PDF document text
    • http://dabutaxezopis.iblogger.org/merawim.pdfIn PDF document text
    • http://wigageturuv.mywebcommunity.org/what_is_the_difference_between_general_and_specific_statement.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
    • http://pabadebaluke.rf.gd/barcode_generator_apk_pro.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_6a09a7150f8640019fb27e5cae704eed.pdf?index=trueIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_ed5a7add88354aa2b75621da87a189ca.pdf?index=trueIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/leica_m6__m7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275dff86-91a0-413c-a2de-f8c75066eaeb/html_css_javascript_jquery_interview_questions_and_answers.pdfIn PDF document text
    • http://sulorunak.rf.gd/gawobekatowe.pdfIn PDF document text
    • http://baguzakanaso.epizy.com/evenflo_triumph_lx.pdfIn PDF document text
    • http://roxadib.epizy.com/endocrine_society_diabetes_guidelines_2018.pdfIn PDF document text
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_2a89865402d94d0b92954deb327cbc80.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16adff52-0bab-47aa-8fa5-cc32388d9ba4/another_way_to_say_warm_and_fuzzy.pdfIn PDF document text
    • http://tokejavopif.rf.gd/gnss_rtk_android.pdfIn PDF document text
    • http://wekujugom.epizy.com/fulipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca29ead-f988-44d1-8763-3bb265f5522a/jurozijoxamixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0795033-fbb2-479b-ab84-285e67a29d15/apc_be550g_specs.pdfIn PDF document text
    • http://zudavowopo.epizy.com/are_total_gyms_effective.pdfIn PDF document text
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_c7cd9ec49f424abab14379bb907be0d0.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_85a72a9f254c40eb9fcc1adf3af09ab0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a248f269-9703-49ab-ac45-58e20fd2f88b/motorola_mt350r_earpiece.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC0 4720 bytes
SHA-256: 3bbbd6fd05148649a7b86fbfbcfa29f98066c4a028658ee62ae14fb171e73e31
font_01_sfnt_off0000fad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD5 5952 bytes
SHA-256: d6c987d4c104aa5575864387ec8581ac430351bda0975c4b02fe93c55f88a558
font_02_sfnt_off00010a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A19 12208 bytes
SHA-256: 0835fb0fa65db171dcd38a8e66a41e3f8c08f60c61d681a0e88dfc8035a1a82a