Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c86de689a1d962…

MALICIOUS

PDF

90.0 KB Created: 2021-06-09 21:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3f4e2b14fadb544f780af67528cb88d8 SHA-1: 53762859d270b6877263f464d5cc6940132c5411 SHA-256: f2c86de689a1d9627c585f6def209b08aa209e6e415908e9e42443891d870f75
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain. ClamAV and ML classifiers identify this as a phishing or malicious PDF. The presence of embedded links and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://synerhu.ru/pbw?utm_term=how+to+tame+a+carno+in+ark+mobile PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386613/normal_6026a1517278a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480408/normal_6068f08f6bf09.pdfIn PDF document text
    • https://ramitafot.weebly.com/uploads/1/3/4/3/134340854/0b1c21e10d.pdfIn PDF document text
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/191833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457590/normal_5fdbd1a39fb36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456393/normal_604e6583ef318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427811/normal_60124181aebe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390055/normal_6023f9e4c7b7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464877/normal_606d6644256a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_604113f2b1d71.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4418747/normal_60b50b1c6fcb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5fef650d64356.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/241de196-3dda-432f-b309-f65c54c5c2f4/68850245947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a7d87b-91f7-4f6b-814a-aa9c2806f048/what_does_the_term_warm_fuzzy_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24a45382-1a86-49e0-9d45-52f4e7e05f4e/pejorafexibovuratezolelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/576b60ba-d4ae-434f-b563-40d213ce43ae/how_to_set_up_a_discretionary_trust_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f831352f-f5c4-4abf-b89b-98aadff3737e/bumatezirawazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c358b6-06ed-46a2-8ea0-2da22f79e16c/53210338406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/013e4a17-b170-4794-a78f-a5cced5d1ec3/baramorigeluxodet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab535b21-23a6-4fa8-bd61-2ab90a0498a9/kesininile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a4953f-82e8-4f35-b644-5656063993fe/satixixipekuxuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a549447e-f766-43fe-844d-ace58e5ec929/brother_mfc_7360n_reset_toner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b89e58c0-31e3-4ee5-835d-56a95bc3ef70/apple_ipad_mini_5_release_date_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef944c0-129f-44d8-b91b-35dc953a1844/60374569118.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF66 3080 bytes
SHA-256: 3aaafc749cb7ac5d3fc08ae2a3eda812612438f97eb30d43e7f8efd7f2ffc2dd
font_01_sfnt_off00010a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A64 5024 bytes
SHA-256: d1c9f491cb2fee16feb2ead0fbe3500bfb37f6de904b54cdbafc2cdc4959d5b8
font_02_sfnt_off00011b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B75 13140 bytes
SHA-256: 288f230bdba9550de2e6b505428f6122d4582e53ac171ccd2c1a9badf0220ad1
font_03_sfnt_off000144b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144B3 16060 bytes
SHA-256: a1e2968ca8c7638dd4bef022e186f3fea2b098bc52bbc7b81535a6634822059c