Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0cbdcf1413da54…

MALICIOUS

PDF

77.6 KB Created: 2021-04-02 22:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 019f5bdc32d1b001eaa977bac2e37af1 SHA-1: d42f0c43ba8c0cf8b3a6321cf6256850375bc9a0 SHA-256: 3e0cbdcf1413da546cfaef699dd0b1dc75b5345818eed5a0b1176b9f2cef27b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt disguised as a helpful guide. The presence of numerous external links, including potentially malicious ones like http://anstel.pro/infraworks_training_guidebpo08.pdf and http://mastericy-chistoty.ru/94399197919ebrmm.pdf, points towards a tactic of directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://anstel.pro/infraworks_training_guidebpo08.pdf In PDF document text
    • http://mastericy-chistoty.ru/94399197919ebrmm.pdfIn PDF document text
    • https://roriwemako.weebly.com/uploads/1/3/4/5/134599113/3398049.pdfIn PDF document text
    • https://dojobojijiwum.weebly.com/uploads/1/3/2/6/132681334/6779792.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bVCGPfG74RQ/wb?keyword=how%20to%20adjust%20manual%20choke%20on%20honda%20lawn%20mowerPDF link annotation
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_3914e5cdab0b46ba9ffcb73ecedb5cfd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/94768b7d-c78b-4640-a493-f06d72e84052/29872882553.pdfIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_b278be7c140d4f99b5cc156f7a64cc28.pdf?index=trueIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_e4647dea190b482dbdea24ebc812f551.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/candy_crush_game_mod_app.pdfIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_cbca58ee5b3f462dae832b6bdb90fd25.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/c_o_kancharapalem_movie_free_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/java_version_8_update_271_32_bit.pdfIn PDF document text
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_390b3d96d25d4883b5a6af0a3d353ac9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea19c00b-a4ea-449e-8a17-19079a218c47/danshui_plant_no._2.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/fleck_5600_sxt.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A3 5204 bytes
SHA-256: bb8224fa23310b9a243618bc34a01d7c5e2a44b7bf87d1ae54af2c0a893b568c
font_01_sfnt_off0000f633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF633 10664 bytes
SHA-256: 5453bf5671126a6a980b94b9a3acda265a5113c35e9a4bd7fa02515101331e50
font_02_sfnt_off00011aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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