Malicious PDF — malware analysis report

Static analysis result for SHA-256 d418b37e27333bb0…

MALICIOUS

PDF

89.0 KB Created: 2021-03-25 07:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3b200a59e03b86a5aa853c8faa726e72 SHA-1: c454d7d37d8f7f911ed60957e6d253b44bd783cd SHA-256: d418b37e27333bb01b0cf42f0c1b0e2158c4fdf2e47a295c340a7333c60778b5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified as a link farm, hosted on various domains including disposable ones. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as Pdf.Phishing.Trojan. The primary attack pattern involves directing users to a multitude of external PDFs, likely to distribute further malware or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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://seumenha.ru/123?utm_term=beyonce+soundtrack+lion+king PDF link annotation
    • https://pitefomut.weebly.com/uploads/1/3/2/6/132682610/roxijerox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481509/normal_603b9428675a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470540/normal_60400408b2186.pdfIn PDF document text
    • http://dutarotanazosuv.medianewsonline.com/amines_and_amides.pdfIn PDF document text
    • https://bipuwuvi.weebly.com/uploads/1/3/0/7/130776795/jijejesokavakixu.pdfIn PDF document text
    • http://keropuxopujeg.iblogger.org/motorola_talkabout_t465_rechargeable_two-way_radio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502870/normal_5fe61f9775847.pdfIn PDF document text
    • https://sowotelimavo.weebly.com/uploads/1/3/4/0/134000290/miwoxibomulox-menubar-minobunogej-xulivu.pdfIn PDF document text
    • https://sonefexezeripu.weebly.com/uploads/1/3/0/7/130739000/eaabe0e86bf53.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/zutemukivanuwuviwe.pdfIn PDF document text
    • http://wusokamojifel.scienceontheweb.net/direccin_de_sanidad_polica_nacional.pdfIn PDF document text
    • http://rotukefune.getenjoyment.net/78248918830.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://s3.amazonaws.com/tiduro/resumen_del_libro_amor_en_tiempos_de_colera_por_capitulos.pdfIn PDF document text
    • http://tizexazebubo.atwebpages.com/astm_a370_standard.pdfIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_332e34c132824c79afd7adb8d8681cc5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/fabajesamusazumofisux.pdfIn PDF document text
    • http://suvalomimo.atwebpages.com/tufinuzokunaxezinividaj.pdfIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_560fa0c0c9ed451b88becf3171f5c85e.pdf?index=trueIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_68cf83d40f02452f925d73387567d77d.pdf?index=trueIn PDF document text
    • http://taxifegizuni.epizy.com/capitulo_1b_vocabulary_check_sheet_1.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/jaws_trombone_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/peer_gynt_suite_piano_sheet_music.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012bb7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12BB7 17736 bytes
SHA-256: 4c5c8d172b14b89f1fb51816db13f01b4f8d762f8e984d67cca2e67de3114d38
font_00_sfnt_off0000f4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A6 5204 bytes
SHA-256: f07f7eb6ed15b4c5540b3ef341407aaa5809aa7e2666b4dc0c18eaccc0ee6b62
font_01_sfnt_off0001066c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066C 11036 bytes
SHA-256: f409645bee21828a66d7297fc5eb12f91e9dfd394c141e1cb09e7c3219a98947
font_03_sfnt_off0001466c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1466C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.