Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf7cfdfef487b56…

MALICIOUS

PDF

71.1 KB Created: 2021-02-06 11:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3b542bdb4faffe915c25dcff65367d4f SHA-1: 9e9812f9135455c23e68c0b99c4ef1311880fff9 SHA-256: daf7cfdfef487b56e273802e3d3bc2ca46301feab6bc1e7de525bb69e52493d9
126 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF hosts numerous links on disposable domains, suggesting a phishing or malware distribution scheme. The embedded URLs point to suspicious domains, likely serving as lures or redirects for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jacksth.ru/123?utm_term=balance+each+of+the+following+chemical+equations.+n2h4%2528l%2529%25E2%2586%2592nh3%2528g%2529%252Bn2%2528g%2529 PDF link annotation
    • http://oneitshop.info/88991958517dus1v.pdfIn PDF document text
    • http://gojepifega.22web.org/vifezarijexidokaponi.pdfIn PDF document text
    • http://rimka.xyz/resumen_de_tus_zonas_erroneas7fd4s.pdfIn PDF document text
    • http://100naturals.fun/shattered_glass_movie_guide_answer_keybelyi.pdfIn PDF document text
    • http://epipog.com/15892402037ybmpv.pdfIn PDF document text
    • http://scrlt.xyz/gba_roms_android_pokemon_hackqkos8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485935/normal_60065d28f2f3a.pdfIn PDF document text
    • http://lesantyqas.online/to_the_moon_and_back_infinity_tattoomarv0.pdfIn PDF document text
    • http://gufutaca3.xyz/microsoft_dynamics_nav_development_quick_start_guider1eaq.pdfIn PDF document text
    • http://milesnires.xyz/commerce_mcqs_with_answersisrnf.pdfIn PDF document text
    • http://cyberlife.store/dadagikogilofojoz5hw4h.pdfIn PDF document text
    • http://mazanatur.space/watertown_mews_1_repton_pl_watertown_ma_02472o2ia7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buxazub.epizy.com/tax_calendar_2019_20.pdfIn PDF document text
    • http://felepav.epizy.com/nice_guidelines_schizophrenia_pathway.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/37053271978.pdfIn PDF document text
    • http://xabuvijuj.rf.gd/sheet_metal_fabrication_bristol.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_off0000cea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA0 6096 bytes
SHA-256: d57f7a6ff4ec4d84c8df9107fb1ed269f39ea9bb04d19b958fca2772f2603f60
font_01_sfnt_off0000e380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE380 12060 bytes
SHA-256: 24888d4031295659fa49e8d1909c5669e64c74065415d68dd4d727deaef9bc4d

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