Malicious PDF — malware analysis report

Static analysis result for SHA-256 d497192226694fb6…

MALICIOUS

PDF

81.5 KB Created: 2021-03-29 04:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fcdfc4c19b046d37f71474a70134c800 SHA-1: 6fd428c7e5782f4e0b20d74df5b076b1e7773914 SHA-256: d497192226694fb6b5292f0f2f2beef1f5a41832e4dda933b10c32faed55103f
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or SEO poisoning attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary malicious URL identified is https://nipisod.ru/strik?utm_term=tire+size+for+2008+dodge+grand+caravan+sxt, which is likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://nipisod.ru/strik?utm_term=tire+size+for+2008+dodge+grand+caravan+sxt PDF link annotation
    • http://jarokixepoweso.mypressonline.com/brandenburg_v._ohio.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/kepisukomujopigef.pdfIn PDF document text
    • http://dulisakip.medianewsonline.com/57367679473.pdfIn PDF document text
    • http://wageded.iblogger.org/darwin_origin_of_species_citation.pdfIn PDF document text
    • http://repair-telefonov.ru/dot_belahan_jiwa_lagu37480.pdfIn PDF document text
    • https://cdn.sqhk.co/bufomofa/ieAQQgj/switzerland_covid_cases_daily.pdfIn PDF document text
    • https://morogixifidogaj.weebly.com/uploads/1/3/4/4/134497599/1026111.pdfIn PDF document text
    • http://nebefajibavake.22web.org/55701766766.pdfIn PDF document text
    • http://bigtittybella.com/86579894319kmvza.pdfIn PDF document text
    • http://wiwovurezibaso.getenjoyment.net/alchemy_and_the_tarot_robert_place.pdfIn PDF document text
    • https://cdn.sqhk.co/kibukumivu/ak6icgc/public_finance_and_taxation_books.pdfIn PDF document text
    • http://givikoninebana.22web.org/boxemavak.pdfIn PDF document text
    • http://good-production16.site/ketojawojomoz67q8z.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/a4igigr/live_news_space_launch.pdfIn PDF document text
    • https://cdn.sqhk.co/dufukeraj/bghjfIi/video_maker_with_music_editor_apk.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/bajuse/10800690995.pdfIn PDF document text
    • http://vakutasuv.epizy.com/aisi_4130_standard.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/answering_bell_lyrics_meaning.pdfIn PDF document text
    • http://bobujosu.epizy.com/46648050172.pdfIn PDF document text
    • http://jemukiguwuw.myartsonline.com/58585763481.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/66549229195.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_off0000f10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10C 5540 bytes
SHA-256: 085b79b38f8939f836c65aa53c2f62cae2d4f74664f24808c15545936ca38e42
font_01_sfnt_off000103fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FA 11144 bytes
SHA-256: 55dc85e48a3d2354fa51ffcfaaaff3f1ecdb5a322b5065b1a70c6305d2ccc87c
font_02_sfnt_off00012a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A13 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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