Malicious PDF — malware analysis report

Static analysis result for SHA-256 507df84ee64867f5…

MALICIOUS

PDF

84.1 KB Created: 2021-03-12 06:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: e8d94ac3b346544124ab225ac6b75091 SHA-1: b7e538e59a1467ead840664f307c444520853f7e SHA-256: 507df84ee64867f5c6cd3af08e7a287d4b465781eaccb80b54fe0751a2d53c29
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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://gimoguvi.ru/wix?keyword=spotify+final+mega+mod+apk PDF link annotation
    • http://jadusugogawal.iblogger.org/bbc_bitesize_ks3_ict_spreadsheets_revision_1.pdfIn PDF document text
    • http://gunojiv.22web.org/cortisone_shot_into_acne_cyst.pdfIn PDF document text
    • http://kepogosibasenip.iblogger.org/40899639485.pdfIn PDF document text
    • https://ferizovewop.weebly.com/uploads/1/3/4/8/134887996/jakisozas_dadorilozu_kevupopudaw_lubutegorigawu.pdfIn PDF document text
    • https://sonikegusu.weebly.com/uploads/1/3/3/9/133997348/bipapup_suxoziro_rebejagurop_rogaton.pdfIn PDF document text
    • https://rajezedej.weebly.com/uploads/1/3/2/6/132682549/voruloxavu.pdfIn PDF document text
    • http://naderuromopuru.22web.org/pdf_to_word_converter_free_download_full_version_filehippo.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/rokekili_xopifukek_zinakinesaguji.pdfIn PDF document text
    • https://gakokoxexoboj.weebly.com/uploads/1/3/0/7/130776672/9808832.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d5ee5d7-4515-43a5-9c4c-768bfbe07377/gegefomumel.pdfIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_067f371e79404656bbade10f1c21f8b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9019c797-0284-4153-b78e-2c7b208fd8b8/how_to_compare_categorical_variables_matlab.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/39409859764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/843ecc50-218a-4493-a486-ef7e0f980d9d/mujolavivujudavuzuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/419c79d2-af79-4a7d-b495-9441d7685ea6/the_ascent_of_money_documentary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c5ed821-63bb-466b-983a-a7212fab74d9/how_long_is_a_bread_machine_dough_cycle.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/55892059459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/180b275d-4ae9-4ff8-9f25-a6cc533253e2/netawuvale.pdfIn PDF document text
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_3e46231011e14e14937ce8110b97cc8f.pdf?index=trueIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_9429ef664d814be99e934ebda703aafa.pdf?index=trueIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_cb0f54cbdc9a45cbbe5cea9d48add589.pdf?index=trueIn PDF document text
    • http://tegofiv.epizy.com/cetus_wisp_farming_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ada30e67-524f-456a-813c-817f3b5ca6fd/fozeviwatebomevenafirola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd6d28fa-9226-4904-8c51-970de94da010/anatomy_and_physiology_book_for_dummies.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_off00010ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA8 5356 bytes
SHA-256: 6fe86645b4c9fe58de5006d4a3b2cb12eda55e25a548c01cf8b4c4b450924ea6
font_01_sfnt_off00011ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE3 10584 bytes
SHA-256: b3d46ebf5c878b69802a6167b5af9f3c5bd4cc4c5b451b337342fd70852c054d