Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea80f8bc0045f89…

MALICIOUS

PDF

45.9 KB Created: 2020-10-01 10:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7d18117c5e990898578d02d82cecae04 SHA-1: e67e53575ad5342d6db6281a4d90ef3caed7f981 SHA-256: 0ea80f8bc0045f89270615275c63bcc57add802454c8937e2f59d994f70b1ce3
124 Risk Score

Malware Insights

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

The PDF contains embedded links and text that direct users to a suspicious URL, identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the document body, though obfuscated, contains the target URL. The presence of embedded links and the nature of the redirector suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://cctraff.ru/strik?keyword=a+weekend+in+the+country+sheet+music+pdf In PDF document text
    • https://site-1037145.mozfiles.com/files/1037145/boxapuzipalagarewifu.pdfIn PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/61413277096.pdfIn PDF document text
    • http://files.hancockfamilyfarm.com/uploads/1/3/0/9/130969045/8402023.pdfIn PDF document text
    • http://files.cancelatimesharenow.com/uploads/1/3/0/7/130775934/talidisojenuza_fogunetivawas_menegikilukur.pdfIn PDF document text
    • http://widuwog.scemachinery.com/uploads/1/3/1/4/131406258/rawewajuzixub_papol_wilezanudefi_sesubiw.pdfIn PDF document text
    • http://xogis.laoshierinmarkle.com/uploads/1/3/0/7/130775209/modowu-nunabaropor-velaz-kigatazenagijod.pdfIn PDF document text
    • http://jokaj.amberyouragent.net/uploads/1/3/0/8/130814328/nunum.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://cdn.shopify.com/s/files/1/0432/2174/5823/files/suged.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/kotasenelilufugiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/56517519411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5224/8473/files/gallery_lock_apps_com.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa5e67d-164c-4ab1-be95-476474bef1f2/jiwawaveselojotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0126b0a7-1085-4925-b0fe-6a8af9fc1786/lekoxevelefijuwemubuni.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_off0000659b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659B 5284 bytes
SHA-256: b6246cd24bcfcf678625defdb81ca1c2abdfffb741fd8a26880e0e870ff28321
font_01_sfnt_off0000777f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777F 10728 bytes
SHA-256: 0a4bc9e704e734e501700d0ce6da0a307bbac7ded3ee04598e225ec30453b34e
font_02_sfnt_off00009c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C0B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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