Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab26981501526ffd…

MALICIOUS

PDF

64.9 KB Created: 2021-05-31 22:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 30cbdee782af9ea7dfaf7ef363d3392f SHA-1: 04445e72843ab7017b8d47a6ac8bd628043f5af7 SHA-256: ab26981501526ffd985aa9cc07044bf06be9bb268721d74e971fdc21b6c8f515
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical finding for a PDF link farm and a machine learning classifier indicating maliciousness. The document body, though heavily obfuscated, contains references to URLs that appear to be part of a SEO link farm strategy, aiming to direct users to external sites. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9263

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://huntic.ru/pbw?utm_term=is+fairy+tail+dragon+cry+on+netflix PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496586/normal_60183f150cc4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416149/normal_604653b5e5a68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_6016a906b6ac8.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4421050/normal_60b35f531746f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_603485ba1d053.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487381/normal_600605b96d412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497078/normal_6021f68c2e3a8.pdfIn PDF document text
    • https://suxokigivulumu.weebly.com/uploads/1/3/4/4/134479742/jifogos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454040/normal_5fd3902cd1af1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491439/normal_5ff7c3d6afa73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450151/normal_5fedacfd6edad.pdfIn PDF document text
    • https://bejejedagaf.weebly.com/uploads/1/3/4/8/134862385/xalimofomonanibu.pdfIn PDF document text
    • https://gupovokezatiku.weebly.com/uploads/1/3/4/8/134878629/lotanesozefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e16e4e67-e558-49d6-bcf8-5bbc4edc5162/hamilton_beach_flexbrew_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed8ac6b-c7ff-4c64-a155-316c2a8f7899/62307891718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae084e42-beb9-4e71-94bc-82b1ee6bc3d5/best_oil_for_35_hp_vanguard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c68094c-7041-46b2-bc15-0ca6581b4b75/8281461760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b8b0dbc-d38a-4cb0-9a74-7e779f037886/42279144289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd2dc85-a168-4932-bc1e-c93b7ea7f865/7476779003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3cf23a-96df-4e1f-9128-c76fabd12947/visual_studio_2013_tutorial_for_beginners_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ec1776-7c0c-4019-94c8-c0522b6abaf9/36305330576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25860cc-508f-41ce-bcba-d144aaa15a1d/ejercicios_de_caligrafa_para_primer_grado_de_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab7c62f-e2b5-4f25-955a-de69d3bdb33e/orbit_sprinkler_system_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a1bfb1-4268-4921-a05c-9c678cc4da38/18052171593.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54F 4044 bytes
SHA-256: 4fd8cea97c37cb44f175974650f3aacba513a8d4c6bbd4f96a2f6b3476137786