Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1d395f1fa8e1d3…

MALICIOUS

PDF

76.7 KB Created: 2021-03-22 07:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6a2e8ada099da9f7cded65dc69483270 SHA-1: e9b392e36c73383de2bd5770b72b712ade8e4d04 SHA-256: 0a1d395f1fa8e1d3ec05337a60dcdb230ce541c7102e0d6eb7faf4b96edaec8f
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, and is also detected by ClamAV as a phishing trojan. It functions as a link farm, presenting numerous external links disguised as search results, with a primary URL related to converting PDFs. The PDF contains a mass of external links, many hosted on disposable domains, indicating a phishing or scam attempt to redirect users to malicious content.

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 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://golowaki.ru/award?keyword=convert+pdf+to+word+free+download+windows+xp PDF link annotation
    • https://ramunigifobix.weebly.com/uploads/1/3/4/8/134891190/12610.pdfIn PDF document text
    • http://ecoservice-vlad.ru/casio_wave_ceptor_instruction_manualk2f49.pdfIn PDF document text
    • http://shopsupergood.site/21881739586xkhpr.pdfIn PDF document text
    • https://xozejobe.weebly.com/uploads/1/3/1/4/131406614/49fdf1.pdfIn PDF document text
    • http://gufutaca1.xyz/figojowogipigetomoozlmx.pdfIn PDF document text
    • http://ogranicbio.fun/janes_fighting_ships_online_editionpkvie.pdfIn PDF document text
    • https://fumuradowije.weebly.com/uploads/1/3/0/7/130739974/zegipuj_dovipuzimewutis_xagogagujibew.pdfIn PDF document text
    • http://raisinshub.club/incident_and_accident_reporting_procedureiajfd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://witigegewujal.rf.gd/sibanagokukipemiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aa2aea6-8bfc-46a3-9d7e-9f0cc3306be3/craftsman_6hp_33_gallon_air_compressor_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1139d6c9-0c8e-406f-942e-afb7eb6c4327/pentair_fns_plus_48_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b8b5201-bb27-48ec-b269-3568fb956f75/delonghi_dragon_1500w_oil_column_heater.pdfIn PDF document text
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_c7973df37e614116a810a1d468865edf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44729cd3-4881-4125-8e80-4d1247f92f03/funadesom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31305f2-d13f-42f6-82e2-1b1c33d4327c/nyc_doe_calendar_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1886670a-bba7-4d2b-819b-7a2b17e3d9ac/fe_civil_reference_manual.pdfIn PDF document text
    • http://ladekaserum.epizy.com/40613418260.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_8e4e5461749e42b6bb0160cb9992512d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3d130e-3bca-44cf-b705-f5883e209675/descartes_meditation_ii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28da16d5-b48a-4a51-82b5-9bb9161e9b5c/xevigakobiburepeteweb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6776b4-8075-439e-8e41-121c2e793b99/beginner_classical_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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFE 5160 bytes
SHA-256: c1301fb4ba73a91e10bed8b1c543935b3cf173046b89699d4b2c18bcdf65dee2
font_01_sfnt_off0000ffb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB2 10944 bytes
SHA-256: 5a2b9e5431e5eab2cdfac2d1d02e41e68dd0aed5633d35ca694146eb8b62985a