Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba552b06763245c…

MALICIOUS

PDF

66.8 KB Created: 2021-01-11 20:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a11ae8844d163b38ab1294e983797cd3 SHA-1: eec2adcecc9dd76ae9ac4ed8f32a4be11f4cf8ae SHA-256: 8ba552b06763245caff42a5f869b175f238141d1467310af43514d5cecc9afeb
126 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous external URIs, including one pointing to 'trafftec.ru', suggesting it's part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a tactic to obscure the true destination. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with phishing or malware delivery lures.

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://trafftec.ru/123?utm_term=hellstern+middle+school PDF link annotation
    • https://site-1179882.mozfiles.com/files/1179882/easy_chocolate_sponge_birthday_cake_recipe.pdfIn PDF document text
    • https://site-1174752.mozfiles.com/files/1174752/new_bollywood_ringtone_2020_download.pdfIn PDF document text
    • https://site-1178309.mozfiles.com/files/1178309/gas_station_locator_application.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxaroposa/bZGDjcY/can_you_escape_6_level_7.pdfIn PDF document text
    • https://site-1178186.mozfiles.com/files/1178186/table_tennis_racket_store_near_me.pdfIn PDF document text
    • https://site-1172743.mozfiles.com/files/1172743/dokolisasokanuwerupokur.pdfIn PDF document text
    • https://site-1177929.mozfiles.com/files/1177929/oscar_fish_movie_characters.pdfIn PDF document text
    • https://site-1174882.mozfiles.com/files/1174882/english_reading_comprehension_exercises_intermediate.pdfIn PDF document text
    • https://site-1172834.mozfiles.com/files/1172834/inside_out_2011_movie.pdfIn PDF document text
    • https://site-1166621.mozfiles.com/files/1166621/ice_cream_sandwich_comics_youtube.pdfIn PDF document text
    • https://site-1167971.mozfiles.com/files/1167971/venn_diagram_worksheet_math.pdfIn PDF document text
    • https://site-1173627.mozfiles.com/files/1173627/36452536122.pdfIn PDF document text
    • https://site-1167947.mozfiles.com/files/1167947/komurovixozotepakus.pdfIn PDF document text
    • https://site-1176800.mozfiles.com/files/1176800/74062475999.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/resixexi/moxafek.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/fulajofojetubesew.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93E 4928 bytes
SHA-256: a93066396302ae66755c04b725e1392d5db636384f993b45dbf9e8a9320c750e
font_01_sfnt_off0000d9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D0 10796 bytes
SHA-256: f284a2afe994d00648d21a62438186c7381f79734ed2b212e2644bdd8d02fe5b

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