Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1634ce2f71d255a…

MALICIOUS

PDF

87.2 KB Created: 2021-04-05 13:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fd2984f2bcfaabc2d65770a59c980576 SHA-1: 2a58bb035414c7f0d533e19bf722f6b97d1fe2bc SHA-256: e1634ce2f71d255a4d3993920e84de7b4766c5e0637a412d76f78edea2f62ff3
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 of which are likely part of a link farm designed to manipulate search engine results. The primary external URI points to a URL that appears to be a lure for resetting camera credentials, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=how+to+reset+my+night+owl+camera PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479688/normal_6009b4f04b1e8.pdfIn PDF document text
    • https://raxeruzuk.weebly.com/uploads/1/3/4/7/134743740/1011844.pdfIn PDF document text
    • https://lozoliso.weebly.com/uploads/1/3/4/7/134775557/tolaz-losukawinilez-zazalo-votuleneguzare.pdfIn PDF document text
    • http://tigutiput.iblogger.org/kagusavasapalenodapolu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476766/normal_6008a0132425d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452861/normal_5fcf1601b6150.pdfIn PDF document text
    • https://migigagabigugam.weebly.com/uploads/1/3/0/7/130775968/pebadawewawena.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://rifimazagajide.epizy.com/affidavit_format_for_name_spelling_mistake.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/annamalai_movie_tamil_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/95235522529.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/where_can_i_learn_master_riding.pdfIn PDF document text
    • https://ea0a6730-5b47-42bc-899c-5b27b21b32ea.filesusr.com/ugd/184298_df11d4f3f63a4582b050119f89378c9a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7194caf3-9d16-4d53-b921-6dd76ba34cae/nonejizibufipuwigunedabo.pdfIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_10c205f434af434abdabea67747e1d09.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6187423b-83b8-4def-a0c1-c02f7025e49f/45008157276.pdfIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_74b5d0d587cf4a1798afd8cf67935159.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/fifakuxuvibelu.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/84701594946.pdfIn PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_87907cf1021842949e5f2845314764e0.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50E 5156 bytes
SHA-256: c91d9ccb9717302428870c0f03eded9c6b322e05b77ce007ca13fc6145c1edd9
font_01_sfnt_off00010671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10671 11080 bytes
SHA-256: f595282b5c7f0a9f32c2f8952dcb62ecc00203d7f8a321431a6378865dcbfa4d
font_02_sfnt_off00012c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5A 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953
font_03_sfnt_off000140f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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