Malicious PDF — malware analysis report

Static analysis result for SHA-256 e067bbdfbe017ee4…

MALICIOUS

PDF

72.8 KB Created: 2021-03-12 16:14:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d48f585bca5de0a660c8c880510afa24 SHA-1: 3d489a2b7ff0c0e5b9e12907dd7df90b745240e9 SHA-256: e067bbdfbe017ee44d0565e6ce75eab4fa3391428ad5e1aa404a929a7d83763e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is pelibifir.ru, which is likely used to host phishing content or redirect to further malicious sites. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of phishing or malware distribution.

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 https://pelibifir.ru/wix?keyword=fyi+for+your+improvement+a+guide+for+development+and+coaching+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479235/normal_60467745553ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_6022dff57cd4a.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://s3.amazonaws.com/werowibovezoje/baxaparusatoxisaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40d1e2d-281d-4dcb-9d9b-da6d72010464/what_is_truth_latin_translation.pdfIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_373f418fe92b4e0cbd1a88427be43003.pdf?index=trueIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_0fbb9fd0428242c88ab40cb97b8d8040.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd37cbe4-3fa4-4964-aca1-f00a3b65b853/78438904223.pdfIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_0868b66b5159435f95ad634fd91bebbf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/pexezisezulija.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/word_puzzles_brain_teasers_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/30015272453.pdfIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_f3e3f8a51deb4ae2a3943fbf552ebd45.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/forupokisip/turagafufaguj.pdfIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_841838348f994660a91a49f8c86ee71d.pdf?index=trueIn PDF document text
    • https://9f2a6cc1-6e15-4467-beaa-57274ca996ed.filesusr.com/ugd/78f4c3_7a79bc3044434c398e7d421c056ba5cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/36363693202.pdfIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_d4d944cac03e40bc8d1215706627b164.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefodek/tezibofagatunirogesuge.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_off0000d140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD140 5388 bytes
SHA-256: 881dea5980409bd99c22f0923bb57961b5de102975bec8476bec9f85fceef949
font_01_sfnt_off0000e36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36E 10716 bytes
SHA-256: 467ab6068ab837f319331812489ee28bbc648eeda6c897f3bcc3ac7bb00924d6
font_02_sfnt_off0001075e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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