Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dec3c0285a3e0d…

MALICIOUS

PDF

73.6 KB Created: 2021-05-04 00:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cad1f6059a4b9a337b336d2269ed3efc SHA-1: d5b27b4bcfd5b514853a5b2baa83331cfaa5511a SHA-256: 48dec3c0285a3e0d85d39d8a3ba9828702d4f81c2c2743de8a2979f7d1f5dd97
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=mankiw+principles+of+economics+6th+edition+solutions PDF link annotation
    • http://xevokegejir.iblogger.org/98198257267.pdfIn PDF document text
    • http://comforfemj.fun/why_is_my_fitbit_inspire_not_chargingvz2gr.pdfIn PDF document text
    • http://ragadugizidej.22web.org/febupupelovinudap.pdfIn PDF document text
    • http://servisvds.ru/tunejimobiw648us.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fidobagasamos.epizy.com/cisco_packet_tracer_7._1_for_mac.pdfIn PDF document text
    • http://moraruvotu.epizy.com/wenamujujedoleborifewafo.pdfIn PDF document text
    • https://874c0fd6-92eb-497b-905f-dc7ca4d2e287.filesusr.com/ugd/5ca7d4_5d08587424b14833b3824d80314cbb71.pdf?index=trueIn PDF document text
    • http://rugunazivesix.rf.gd/ncert_biology_book_download.pdfIn PDF document text
    • http://magonusu.epizy.com/brisky_new_songs.pdfIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_99cfb753f9d2475c801c0072ee241c76.pdf?index=trueIn PDF document text
    • http://pimuxexud.epizy.com/gchq_code_breaker_challenge_answer.pdfIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_06fc9eb947ed454ca3d1b19cb2a10bf8.pdf?index=trueIn PDF document text
    • https://5fb3b2f4-e86d-4029-b823-ac5950ddf4c1.filesusr.com/ugd/c0aa49_5a4afb5a555341068ec369b623e0da7a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f2afd9b-f74f-4b63-a81b-7022c2db2c7e/dna_replication_coloring_worksheet.pdfIn PDF document text
    • http://fotebujos.epizy.com/covering_letter_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f30e13f2-cca5-4274-87b8-14c6f4e8e600/xigaw.pdfIn PDF document text
    • https://03df74f7-894d-4c84-999e-da2b33eb06f5.filesusr.com/ugd/4c7733_d390f9a109ae45ddb4772b7841a42fca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/066d6afc-9195-4f63-be95-c2c0146ad1bb/jusojebimopugiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f783c04-3617-42cd-9a30-b0b43af180c5/59782076667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24a1e999-a9ed-4ef5-bc0a-add7209f31b0/nunizux.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AE 1528 bytes
SHA-256: 64d53b4318ba7dc869bcefe2c6c56431e6e12bcaf96a32242cfa9e17b755ba3b
font_01_sfnt_off0000e176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE176 5708 bytes
SHA-256: ce293749944005c7e6ddddb0b4d6bbab00c41bb215e8a01aeeb322061edf3dcd
font_02_sfnt_off0000f4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DD 10520 bytes
SHA-256: 9b14f075a59c819d210a92cbaab4455bbbfff2dc6dbf86086df101c7c819edde