Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd035ffbc188a27c…

MALICIOUS

PDF

103.7 KB Created: 2021-02-19 05:50:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9ad2eeb7efe2b9e7148162f5877525cb SHA-1: b93762199aeed8f935dc8f4acc9f2aa3bc5486ec SHA-256: dd035ffbc188a27c02728afd255dbd323d8b8bee8cecdb8993d75159fcae0da4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to suspicious domains, and is flagged by ML classifiers and ClamAV as malicious. The primary suspicious URL, https://bologen.ru/wix?keyword=..., suggests a phishing or malware distribution attempt. The presence of embedded links and the overall structure indicate a likely attempt to direct users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://bologen.ru/wix?keyword=%25D9%2584%25DB%258C%25D8%25B3%25D8%25AA+%25D9%2582%25DB%258C%25D9%2585%25D8%25AA+%25D8%25A7%25D9%2586%25D9%2588%25D8%25A7%25D8%25B9+%25D8%25B1%25D8%25B3%25DB%258C%25D9%2588%25D8%25B1+%25D9%2581%25D9%2588%25D9%2584+%25D8%25A7%25DA%2586+%25D8%25AF%25DB%258C PDF link annotation
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/mumoxomivas_xapaxi_jivurixetekakow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486351/normal_5fe687af4194d.pdfIn PDF document text
    • https://tevunuxewime.weebly.com/uploads/1/3/1/4/131452804/9ea63.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/36fd86fe.pdfIn PDF document text
    • https://pevivifigevesiw.weebly.com/uploads/1/3/5/3/135315965/f05cefeee97e.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/9759217.pdfIn PDF document text
    • https://nibafokabatawal.weebly.com/uploads/1/3/0/9/130970001/4323253.pdfIn PDF document text
    • https://bivolureru.weebly.com/uploads/1/3/4/5/134583024/jewujona-nilagavo-gezifabafok-dowoxikudajedex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5fe2adfa70d05.pdfIn PDF document text
    • https://bojuwakuxejekur.weebly.com/uploads/1/3/5/3/135347713/0947bea5b819765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_600a3e5420945.pdfIn PDF document text
    • https://kuvolobogon.weebly.com/uploads/1/3/4/0/134012650/wulomas.pdfIn PDF document text
    • https://xexibufit.weebly.com/uploads/1/3/0/7/130739933/kimovomogibin-gonutog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467325/normal_5fc8c62a58be0.pdfIn PDF document text
    • https://tuvukorop.weebly.com/uploads/1/3/1/8/131857527/9334260.pdfIn PDF document text
    • https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/6138748.pdfIn PDF document text
    • https://dosijikapok.weebly.com/uploads/1/3/2/6/132682778/632decca2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/business_expense_report_categories.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/android_google_manager.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/40136128391.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/classification_of_living_things_worksheet_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/93396803781.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001577f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1577F 30304 bytes
SHA-256: ab4045ee6eb00ee78c151a1905c51ce9a49fff0d43d50ff9b7a2809922caffd9
font_00_sfnt_off000101f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F3 4068 bytes
SHA-256: fe5845eca8d572efd05f1fc346cd26ccf8e6a61ffef9368fa2b12e0641c60633
font_01_sfnt_off00010fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC8 2508 bytes
SHA-256: 85ce9365e051d94dc5d0aec1e93c33ce6655e6a09aeb7d0a0f30152d5622b999
font_02_sfnt_off00011aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAA 9532 bytes
SHA-256: caa24848c42e2222668a55d432da850d56507b6ad0dbb90d651bbe8e996051a8
font_03_sfnt_off00013b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B7D 18216 bytes
SHA-256: ac20cf8e301e31819e1f813b4b1415e09123891c7e89a83cb9130a7eafbb00e6