Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d3eb93aaf0ad4aa…

MALICIOUS

PDF

79.8 KB Created: 2021-03-29 20:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a0fe93cfabc23069344a50072b7f897a SHA-1: b0e7a208ddd86065f4181443dabcd5ee60a5801f SHA-256: 1d3eb93aaf0ad4aa4bcc9ee1cfdac6be2140bbdde741910c6fa63742e1510b6e
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=how+to+draw+a+magical+kingdom In PDF document text
    • https://static.s123-cdn-static.com/uploads/4393041/normal_5ff1e96671be5.pdfIn PDF document text
    • https://kixoligo.weebly.com/uploads/1/3/4/6/134608980/fukemagipi-wopujaw-vasebu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_604204c4165db.pdfIn PDF document text
    • http://pro-komp-master.website/audacity_record_computer_audio_windows_109lr0h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_600d9a7550a8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476148/normal_5fff9eb8dd84b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_5fd8bf319d5b5.pdfIn PDF document text
    • http://arnautmebel.ru/business_analytics_jobs_descriptionzlxen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446029/normal_5fda734682907.pdfIn PDF document text
    • http://itanah.space/funny_sound_effects_pack_free_downloadkhjjt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369315/normal_6000190ca7bab.pdfIn PDF document text
    • https://kikitepolo.weebly.com/uploads/1/3/4/5/134514310/jolafomu-medor-jalinobipurere-lesaneluwe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459329/normal_5fc68df4a0e03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_5fdb37a9a1232.pdfIn PDF document text
    • http://steblin.pro/31644981187bgmu3.pdfIn PDF document text
    • https://guvorike.weebly.com/uploads/1/3/4/2/134266232/fogoxo.pdfIn PDF document text
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/delilodunum_wugapofudobema_xosujip_lasoged.pdfIn PDF document text
    • http://itawegan.space/what_cards_are_in_a_traditional_tarot_decksdz8p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/40126445259.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/47111692495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa7a69d-a6b7-4b0a-bd5a-4d6061d9b8d8/pictures_of_the_cast_of_little_house_on_the_prairie_then_and_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da1e08b3-7501-49b3-8655-dd38fd88a903/como_crear_abundancia_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/how_to_connect_my_canon_mg3222_printer_to_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/jebelanojaxuxule.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_off0000fa18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA18 5196 bytes
SHA-256: 7083a56b8a6c1fa623166fd70203950750801add4e49f6480d924d723e09862a
font_01_sfnt_off00010bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC2 11088 bytes
SHA-256: c9e8954ac70ecda41451872a2b4e32c4b16874d85e7927cb2b8232e0f7d1ecf8