Malicious PDF — malware analysis report

Static analysis result for SHA-256 093273f7b29ab0a6…

MALICIOUS

PDF

147.9 KB Created: 2021-03-28 18:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2c7e07d57af7f29018ec967ad327374f SHA-1: 212db13e2cfe87078dd65d3e8f9068cdd1f80f64 SHA-256: 093273f7b29ab0a6f2fd96a88ddd926959b0d5c7b4f2ff4eba92798ac2d4342a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a notable one pointing to zajinet.ru, disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 5

  • 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 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://zajinet.ru/award?keyword=antioxidant+activity+introduction+pdf PDF link annotation
    • https://sisexalixigana.weebly.com/uploads/1/3/5/3/135323773/5e886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494165/normal_602761b6aa073.pdfIn PDF document text
    • https://moxuzoketo.weebly.com/uploads/1/3/1/1/131164531/kavuwizibopewut.pdfIn PDF document text
    • https://popogupu.weebly.com/uploads/1/3/1/3/131398113/8859259.pdfIn PDF document text
    • https://vixezikuf.weebly.com/uploads/1/3/1/3/131383943/pazusisutizutuf.pdfIn PDF document text
    • https://dukilasurijase.weebly.com/uploads/1/3/2/8/132815907/edca4d288.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420250/normal_5fec509bc616c.pdfIn PDF document text
    • https://komutezux.weebly.com/uploads/1/3/1/3/131398036/3745485.pdfIn PDF document text
    • https://zujamapetot.weebly.com/uploads/1/3/1/3/131381682/92cd13457944.pdfIn PDF document text
    • https://zojovotonoturur.weebly.com/uploads/1/3/5/3/135348007/6831638.pdfIn PDF document text
    • https://tefojemitadu.weebly.com/uploads/1/3/1/6/131606809/fazutude.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365598/normal_6008e1c651883.pdfIn PDF document text
    • https://gorasamigizutod.weebly.com/uploads/1/3/4/6/134600185/xanes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_1b19b10b86574c1f840ce0f271605706.pdf?index=trueIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_d0e4013e48854837b6ddea45674f29bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd57a26c-18ae-424d-9fb2-dd66193ed7a4/pride_and_prejudice_full_movie_online_free_2005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38facf64-0998-41e3-a446-9cd0b13d5c66/16862755097.pdfIn PDF document text
    • https://79e5ec13-148a-49e7-9308-7b7844992bd9.filesusr.com/ugd/1d149b_cad9d736f861480ea58f3ea5431f6379.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf140543-5989-4bce-82de-48fc6cfa29f4/why_is_my_fitbit_versa_lite_not_showing_text_messages.pdfIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_155137fb096a4af4a079b81a45f4d2a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc44fef-8cc3-4732-88fe-b734eb6dd040/naxiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa6cf71-4107-49b2-b714-bbfa74bcd3a9/surenutufosi.pdfIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_b406cf0518c44b84893095c09681560a.pdf?index=trueIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_f0540e75febe40f3a6ba10bc33c8d78f.pdf?index=trueIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_03ec8f1a19bb46ab92085606b6231101.pdf?index=trueIn PDF document text
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_4ebe359cbf814cc6b6750f601bb07953.pdf?index=trueIn 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_off0001ec56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC56 5156 bytes
SHA-256: 1aeb2fc978fb46860c6396763881bed64109672a846c430fa796328c3dab5f31
font_01_sfnt_off0001fe05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE05 14280 bytes
SHA-256: eaad4d534053dfb5b7e52e719bf78312c2dfa2629b89cd3069bf955365dd32a0
font_02_sfnt_off00022bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22BC1 16108 bytes
SHA-256: df002dda48ffbc6f6385b7668b64d3af09f68fbc2da909ce735eb4157b56ef59

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