Malicious PDF — malware analysis report

Static analysis result for SHA-256 010d83b8139974d6…

MALICIOUS

PDF

78.0 KB Created: 2021-04-28 08:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 582520feec99e841752db723a9d2d7e9 SHA-1: 0dd52e0d23b6917d65101de391034b963d08f6e0 SHA-256: 010d83b8139974d6ab2775dd6e25827eadfc598df2c21ad277be3fc8d6efe27c
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 generated for SEO purposes, indicating a link farm or spam campaign. The primary malicious URL identified is 'https://pelibifir.ru/strik?utm_term=how+do+i+set+my+carrier+thermostat+to+heat', which is likely used for phishing or distributing further malware. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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://pelibifir.ru/strik?utm_term=how+do+i+set+my+carrier+thermostat+to+heat PDF link annotation
    • http://zefutuwukeras.getenjoyment.net/namalubawejagabubuxatete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_5fd100581395a.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/iy9Jhbj/guess_the_song_picture_quiz_answers_bollywood.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/english_urdu_dictionary_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/idSJhf1/learn_spanish_through_english_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373985/normal_6006ec2797ba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393370/normal_602eff82cb919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446635/normal_60679293c5ad0.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/jepinebawo/dauntless_guide_armor.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/goxogeme.pdfIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_dc16e66733ce4822bba7998014f47860.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/47323867185.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_c5fe832d14b847c6b4e169652aac7983.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/xobiwasefixudav.pdfIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_3c0553879c6d44fe92617cccbefe1ec0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavabi/whats_the_best_stock_analysis_software.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/dotevepexabaz.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/fawaferubowuwof.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/konovifitiriba.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF316 5300 bytes
SHA-256: 5bd14f0f057b4f9c2ed61fd5f2e6528efd3bd4ab984e0335cfe3edeb10412096
font_01_sfnt_off00010505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10505 11108 bytes
SHA-256: 5cbc575a37aaa6b214039bccf0a2c5daad3fd86d93ee96221aa606d31d973dff

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