Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc0e6081592a740…

MALICIOUS

PDF

42.0 KB Created: 2020-10-25 09:14:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c46db71c3dd47490d2a142777de185b6 SHA-1: 211f8fa80c8e6178cb619feb6d3144f88a0d2010 SHA-256: 2fc0e6081592a7407e7f4c2d63019496ae30c3d7f7ac9749257b56c2e3d12784
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.link/aws?keyword=systools+pdf+split+merge+tool+safe In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5f945a8491032.pdfIn PDF document text
    • https://fomomeku.weebly.com/uploads/1/3/2/7/132712435/f1e2437bae7.pdfIn PDF document text
    • https://podesasi.weebly.com/uploads/1/3/1/4/131437149/1102816.pdfIn PDF document text
    • https://nalakipivexovob.weebly.com/uploads/1/3/4/3/134385055/konafabekor.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/bupemigimamuvap.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/620e2cf5ba19.pdfIn PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/kedukazipitu-pobefed-zenarolez-fojejodu.pdfIn PDF document text
    • https://gokefezenomi.weebly.com/uploads/1/3/4/0/134040807/1727895.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000064c5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000064c5.bin)
    • https://s3.amazonaws.com/votuweroxigezog/webemamukabe.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/1498703694.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/95957544531.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/math_tricks_book_in_hindi_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5725/3018/files/algebra_2_unit_1_test_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8675/0913/files/georg_lukacs_history_and_class_consciousness.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6358/1090/files/19984064132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6375/3885/files/national_interest_in_international_relations_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0095/7608/files/zalugasafetekogufolitaxup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0090/5380/files/tivefefuxewalivofu.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 extracted file (font_00_sfnt_off000064c5.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C5 5568 bytes
SHA-256: 576e49db3d8d574f6753be1652a67ddd7661ab470640f30f3e736df1226515a7
font_01_sfnt_off000077a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A6 10436 bytes
SHA-256: b5d80eba9f0635f9c5a32fe81a9d300ca50d87a49ca0efcdd7dc7b59237c6274