Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be699edeabcac3f…

MALICIOUS

PDF

74.7 KB Created: 2020-11-13 04:33:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f07325448d3914be364b54e3329d5a7c SHA-1: bc529a7dc7e22fd3aed4a66b21e2252a3ea47ffe SHA-256: 1be699edeabcac3fc9e34b7430ae30ccb500a21b8126fbdf319383494b4a2383
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The presence of a URL with 'utm_term=la+times+crossword+answers+feb+1+2019' indicates a lure to attract users searching for specific content. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://traffset.ru/aws?utm_term=la+times+crossword+answers+feb+1+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5f8c5bf574d24.pdfIn PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/756c3f.pdfIn PDF document text
    • https://gimunoje.weebly.com/uploads/1/3/4/3/134344093/fegatafezev-mukupaloreso-tedemezawapij-nariku.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/2681029.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/nusev_kabexujusa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487662/normal_5fa902b232839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f870adbe6ca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f87524bd2d37.pdfIn PDF document text
    • https://nilozirarita.weebly.com/uploads/1/3/4/4/134463528/d19129b22b59.pdfIn PDF document text
    • https://suvojenedixu.weebly.com/uploads/1/3/4/3/134354738/wakugowubitaxadoda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383928/normal_5f9c021817764.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed6b6d96-f973-4bf3-9f31-22fb148276a2/zalegipixobemadarukekig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b768f61-1f4b-4767-b4bd-2698d9b70071/xeputiduxivajuwugogurube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50f3430-3c56-4bd4-986f-07aef19906f1/similar_triangles_in_the_real_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e58af82-e3ff-44ba-aad7-da8cb343dfb8/entrenamiento_para_triatlon.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE48 5788 bytes
SHA-256: e5bb182fa0a4afe971f74d25419c78100016b1e64664686bbf5a069d876ef42c
font_01_sfnt_off0000e1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FE 11472 bytes
SHA-256: 53e9ff52bf544affd8b441b1bebbca0d7a28f178d9b5951c1cbf8a934d87079f
font_02_sfnt_off00010833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 16240 bytes
SHA-256: 0abc301a75bcb62837e1b39699efeab516a7677702cdcadbd45931fa139eeed5

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