Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1681b63b623b13…

MALICIOUS

PDF

43.4 KB Created: 2020-11-09 15:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2978bd5d595bbbd993fdaa8b60e9f0a9 SHA-1: 1665df821bef5ba3e90e53e4c0fcf93d9500e625 SHA-256: 2d1681b63b623b135f149c5ddf0c6945fb0d8174afc21a7e417b292b9e6687cb
136 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to external resources, suggesting a link farm or phishing attempt. The document body text and heuristic firings indicate the PDF is presented as 'the outsiders answers pdf', a common lure for users searching for specific information. The presence of embedded URLs and the ML classifier's high confidence score strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://trafffe.ru/aws?keyword=the+outsiders+answers+pdf
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f86f417256d1.pdf
    • https://kavaxaxogemiren.weebly.com/uploads/1/3/4/4/134441995/kiralo-gerepajuxebu-farejoga-wosajokekutoz.pdf
    • https://cdn-cms.f-static.net/uploads/4421473/normal_5fa4c077c7c40.pdf
    • https://fijudemi.weebly.com/uploads/1/3/4/4/134400988/lokodamatusenaf.pdf
    • https://zunejafeg.weebly.com/uploads/1/3/4/3/134382709/7901856.pdf
    • https://zunejafeg
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gapivegek/comma_splice_worksheet_high_school.pdf
    • https://s3.amazonaws.com/sowewazulejewi/gakobakanolagogaropiz.pdf
    • https://s3.amazonaws.com/xezonijida/mivigap.pdf
    • https://s3.amazonaws.com/sukedil/complaint_letter_in_hindi.pdf
    • https://s3.amazonaws.com/tadovu/cmd_commands_for_hacking_wifi_password.pdf
    • https://s3.amazonaws.com/lakadutof/83411056597.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db1.bin
eb5d03134156bb523de39b52c0431017571c2fd2c0d9584ec0393484bfbfc922		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB1 5020 bytes
font_01_sfnt_off00006ecb.bin
b4d7bdc8288f323562acca7e47388bc98f67ff051cfa27bc5c3df9a6a045d943		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECB 10616 bytes
font_02_sfnt_off000092f2.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F2 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.