Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3175a2be0f2f8e…

MALICIOUS

PDF

84.4 KB Created: 2021-05-24 20:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c2acfcfde7b94254806d8ff55ea11036 SHA-1: c41e29d1d1b7863f4443b6b96edafe6f105ae957 SHA-256: cd3175a2be0f2f8e1c0e431c9110300ac3eecf13a22082bdeb015507634ea451
196 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a phishing or scam attempt, indicated by the 'injustice 2 mobile ai cheats' lure and a high volume of external links, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely involving the distribution of malware or phishing content through the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://kuzutuzo.ru/strik?utm_term=injustice+2+mobile+ai+cheats PDF link annotation
    • https://jeluxipofike.weebly.com/uploads/1/3/4/4/134490416/50272bd3c8f5cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_600f91ac81a3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366664/normal_5ff0091fc1e62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464878/normal_60254753d39dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445726/normal_5ffe0fad31d5f.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/8136943.pdfIn macro / runtime command snippet
    • https://static.s123-cdn-static.com/uploads/4389387/normal_5fcb9d6d49033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_605d77f2e2db8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425913/normal_6062f20170da7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487431/normal_600bf6294bdd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493890/normal_60580bf85466e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492272/normal_6049b31243433.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
    • https://uploads.strikinglycdn.com/files/c5574150-7d59-41de-96ad-bfb2287d2dd8/walmart_photo_blanket_discount_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca4da2c-8d3f-4c5c-9d56-fa48e07e0e83/cuantos_metros_cuadrados_cubre_1_metro_cubico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1cbdd09-7f57-44f5-b86f-ce9051b2c366/vuxakuliwojadim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99441102-e5e7-48c2-b604-1b298862f782/list_of_harsh_sounding_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c049fa0a-fed3-41af-b9a7-cb5f3838b4f4/dell_latitude_e7450_core_i5_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45041908-288b-4e3a-8bb2-2c575c72eba0/67550944575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5650b903-310b-4019-9a6f-575b10f16966/lixasamuxakibemuvulopase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc0a35e1-598c-4b48-9978-540e3e337c48/microsoft_office_professional_plus_2010_activator_cmd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e0a33e-1ada-4c31-b411-c928e282fd0a/44076838376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/983f292a-b43a-4e3f-b81e-57fae42bd4db/69617192037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/469f2ced-0683-469d-a39f-9d82fe1f73d7/what_is_the_best_app_for_counting_calories_and_carbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1717b38-4c47-492e-8fbd-8755ba74f574/51972819928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84709b3c-23c4-4ad2-a7cd-fff4527920e4/razones_trigonometricas_ejercicios_resueltos_graficas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f20040-51cc-4270-ac0f-dca5cc1decae/redragon_k506_centaur_gaming_keyboard_black.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
    • https://uploads.strikinglycdn.com/files/b2e0a33e-1adIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCB 5112 bytes
SHA-256: 03080736d0bd30ea8d4237b4780a98677d8320da1bced58151c9813f0240b4b7
font_01_sfnt_off00010e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E00 11116 bytes
SHA-256: 2dd8e9421e3337327314f1beb83f105488b09d8fae3e6d6f965e448973188175
font_02_sfnt_off000133d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34