Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eed5fa1a008bae8…

MALICIOUS

PDF

100.5 KB Created: 2021-03-05 11:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0ace98d05533203cbd979af0d4d52aa8 SHA-1: e21970cbd7980db1625b536a5077b5311ae1420c SHA-256: 7eed5fa1a008bae8639b3fed832f1fbe8d6314425570f94cd30fa6a0259b0878
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, including a link farm, directing users to potentially malicious websites such as 'midufefew.ru' and 'lajukigoguxozu.weebly.com'. The document body, though heavily obfuscated, suggests a lure related to legal proceedings, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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 https://midufefew.ru/wix?keyword=verified+answer+to+complaint+federal+court PDF link annotation
    • https://lajukigoguxozu.weebly.com/uploads/1/3/4/5/134529026/dudev.pdfIn PDF document text
    • https://mexobuvuxe.weebly.com/uploads/1/3/4/3/134369937/9cb618731cd6d.pdfIn PDF document text
    • https://gitikaru.weebly.com/uploads/1/3/4/9/134901111/5679749.pdfIn PDF document text
    • https://pijaremurepapo.weebly.com/uploads/1/3/1/4/131406688/314def5485.pdfIn PDF document text
    • https://sugasukeni.weebly.com/uploads/1/3/4/8/134878852/4503157.pdfIn PDF document text
    • https://subegudikowezi.weebly.com/uploads/1/3/4/4/134476363/79e03fad4d747.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
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_6e843fc33f294cc4a3a4e439beeec4e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gozifep/explain_nonlinear_graph.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_590f3fdb2fb744a998ec9180f13678fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuzed/93480004174.pdfIn PDF document text
    • http://sukidagijonola.rf.gd/bearded_dragons_facts_and_information.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/levumidovenomo.pdfIn PDF document text
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_14f434ebc2c043b39c6e65ba66bc10da.pdf?index=trueIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_31240cb284af4c2699764970b22dbd6c.pdf?index=trueIn PDF document text
    • http://tokavasetalan.epizy.com/jabunubamefitarugupiwex.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/bavag.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_off000141fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141FD 5240 bytes
SHA-256: 77f72b6c899e17a1244cabc3a97ffc7ebd07bf105547d604fc497c6bab5abf39
font_01_sfnt_off000153c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153C5 10208 bytes
SHA-256: f966a4888133be3a2da81c71aa524ceb8fd3864f2e816581f617023de454d999
font_02_sfnt_off000176b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176B9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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