Malicious PDF — malware analysis report

Static analysis result for SHA-256 f229e733998edf12…

MALICIOUS

PDF

86.6 KB Created: 2021-05-12 12:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 752c4189dea5b190533f556d36262ed1 SHA-1: fa8363748d44d9ed75524f66e2f6c46bae8c65da SHA-256: f229e733998edf12d7698a9eee87a8f5002aaf5f261feb3ece9cb9393c2d7957
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malicious intent. It contains a large number of external links, suggesting it's part of a link farm designed to manipulate search engine results or redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristics point towards an attempt to host or link to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://tifusavegapawuf.mygamesonline.org/3_states_of_matter_worksheet.pdf In PDF document text
    • http://wimebenese.getenjoyment.net/vofasifezewidi.pdfIn PDF document text
    • https://selegisazo.weebly.com/uploads/1/3/5/3/135323244/kepevowilesu.pdfIn PDF document text
    • https://jumobagovuv.weebly.com/uploads/1/3/4/6/134697352/1679791.pdfIn PDF document text
    • http://rasazajafatirek.mypressonline.com/pupanaxakinojufibamis.pdfIn PDF document text
    • https://bibatajikoxego.weebly.com/uploads/1/3/5/3/135315017/2385268.pdfIn PDF document text
    • https://mapadubedebo.weebly.com/uploads/1/3/6/0/136095435/xidudikivudelo-zedexujapav-rigos-jonipozakajaja.pdfIn PDF document text
    • https://tadizape.weebly.com/uploads/1/3/1/6/131637484/ba44ac2d18.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/61737796535.pdfIn PDF document text
    • http://wupunekum.getenjoyment.net/vibizalakelamu.pdfIn PDF document text
    • http://roselosudeve.sportsontheweb.net/flushmate_m-101-526-f3_installation.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/nexawatakemobepini.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/business_plan_for_online_shopping_website.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/vAIYpVcV8Aw/wb?keyword=health%20and%20safety%20code%20texas%20365.012PDF link annotation
    • https://uploads.strikinglycdn.com/files/b9a5bf2b-2451-4213-8dbb-4497c01a2a4e/what_is_hikvision_camera_default_password.pdfIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_4098e0293c0940bda90d73e64a6d999e.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_9572fc1c0d4740f195832a6b36ea0fca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd184a9-d0d5-492a-bd9b-bdbeb03e270b/national_electrical_code_2017_handbook_free_download.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/70156079188.pdfIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_5a30283614aa473d9afdf102465aefa9.pdf?index=trueIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_14d09c6dd3b843f8adc41d3c077c4d9f.pdf?index=trueIn PDF document text
    • https://f5d5bca3-0ffd-41e3-a77d-3d805a1e43e5.filesusr.com/ugd/4e23ca_58d3c18846dc4d8fbcfaedc4f1b7448b.pdf?index=trueIn PDF document text
    • https://8ea4a4fb-2859-49e6-8c89-66ed49166bb4.filesusr.com/ugd/0088c1_ebe70ca03c1c4103b3de7bd5db09c58d.pdf?index=trueIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_8ce1538cbfbc474897be967e5a0b3d3a.pdf?index=trueIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_95e9f27c35bd4fdf849fb4d79005169b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16b34c8-331d-4c3b-b7a0-25c7f8f8e0e5/what_is_a_natural_cubic_spline.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11460 5944 bytes
SHA-256: 9a8514141de6090ae917d7c24684959995c18b0c5cb16970bf6df43532080dda
font_01_sfnt_off000128b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B0 10672 bytes
SHA-256: 8ddb575ee13611ff6652dc4b11b4ec9be1b652a086fa7c54d1702b97e36a6473