Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a30f42d17ad7d3f…

MALICIOUS

PDF

76.7 KB Created: 2021-02-16 02:22:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a85bcf40aaf9915da9e562c03808c4ce SHA-1: d61926b75f383a2794855bbc54e2492362a4ec85 SHA-256: 2a30f42d17ad7d3f2f80811242f79b62d0148a193e3cdb8ef219fa41fc97dfaf
124 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 hosting and are designed to redirect users to malicious sites. The primary lure appears to be a search query related to Twitch and Amazon Prime, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the link farm heuristic confirms the intent to distribute malicious content via numerous domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+do+you+subscribe+on+twitch+with+amazon+prime In PDF document text
    • http://mamontov-net.cc/boomerang_app_cartoonsg0vh4.pdfIn PDF document text
    • http://secureappeal.com/je_suis_dans_la_joie_glorious_partition15s8y.pdfIn PDF document text
    • http://kpupnov.pro/tojuturuvo7244f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_601dba2844a63.pdfIn PDF document text
    • http://prodson.fun/40232931496063re.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412403/normal_601f1d7729b1c.pdfIn PDF document text
    • http://dorightunion.com/gibuturabxtsq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_6026df37f40ab.pdfIn PDF document text
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/4bd35e0023569.pdfIn PDF document text
    • http://world-wild-shop.com/ccna_routing_and_switching_study_guideegmtq.pdfIn PDF document text
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/6598189.pdfIn PDF document text
    • http://getyourscore.info/24115178970huwb3.pdfIn PDF document text
    • http://naturalgood.space/vusatolafokodiwax06fo.pdfIn PDF document text
    • https://lipijubirenazob.weebly.com/uploads/1/3/4/7/134722159/tedexojuw_vezezu_wepizaj.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/c8c2a055e.pdfIn PDF document text
    • http://startbastar.online/pick_image_from_gallery_android_fragmentxgxwb.pdfIn PDF document text
    • http://gufutaca1.xyz/adding_text_to_photo_android1aahl.pdfIn PDF document text
    • http://7lessons.fun/69374605047iaaqg.pdfIn PDF document text
    • https://ganizosu.weebly.com/uploads/1/3/4/4/134434359/vixomonawuwuxa.pdfIn PDF document text
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/f7c19e343.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D3 5628 bytes
SHA-256: 42906fea7dbc3d509d760c154374f59a3fb12a6c56d6e1a425756c028167d7c5
font_01_sfnt_off0000f5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DA 1796 bytes
SHA-256: 68bbe42c93759ab90c218695aa25c1747b40456063d11b0ac06b51d2514fd3e6
font_02_sfnt_off0000fe65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE65 11488 bytes
SHA-256: 684704905bac6eb1d3354fbd605cf92f2d4d90e29b1c5c4e4f96c8dfd4bb9406

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