Malicious PDF — malware analysis report

Static analysis result for SHA-256 db56feb15d9dd18a…

MALICIOUS

PDF

70.1 KB Created: 2021-06-01 13:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 479e1cc42af2699946e1fd920435bb87 SHA-1: 667368981a74bbae24f52445f3bb61501fcfdce2 SHA-256: db56feb15d9dd18ad25002abfa348f2b9ad852b470886a1e866844ca3c7fc9b2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content or phishing sites. The primary external URI, https://allytemp.ru/pbw?utm_term=neighbors+2+sorority+rising+full+movie, is likely part of this malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/pbw?utm_term=neighbors+2+sorority+rising+full+movie PDF link annotation
    • https://mulevemi.weebly.com/uploads/1/3/4/7/134754511/sogowujaxiduk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459185/normal_601ef51b64de0.pdfIn PDF document text
    • https://kenuvibugitevam.weebly.com/uploads/1/3/4/7/134700053/vadawebubaxep.pdfIn PDF document text
    • https://juximejejin.weebly.com/uploads/1/3/4/3/134365908/vubibisamokudotebu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383921/normal_5ff4cc8c69f6c.pdfIn PDF document text
    • https://kugavibutatabo.weebly.com/uploads/1/3/4/6/134613496/5b8f0911e39.pdfIn PDF document text
    • https://vofixerexelisat.weebly.com/uploads/1/3/4/3/134311693/zuvumo-zixamenuk-sowojiket.pdfIn PDF document text
    • https://niwubeleligijoz.weebly.com/uploads/1/3/4/7/134764474/7492471.pdfIn PDF document text
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/tufaratul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381528/normal_60020e8e847e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://podixarutib.pbworks.com/w/file/fetch/144451767/35442070664.pdfIn PDF document text
    • http://togusan.pbworks.com/f/advantages_and_disadvantages_of_non-_probability_sampling_slideshare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cffff8ca-c79e-4537-a4ab-b4fe40d0b3a9/nibofuviditomutedijeseba.pdfIn PDF document text
    • http://lokiboz.pbworks.com/w/file/fetch/144442053/can_i_teach_myself_jeet_kune_do.pdfIn PDF document text
    • http://supijexed.pbworks.com/f/lekepunawam.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/what_lives_in_a_swamp_ecosystem.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144417720/monapabut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5212047e-b5af-4222-b744-20351e759616/98044519618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b180c5-86dd-4029-85fa-b0b7cf77f1c6/how_to_connect_wireless_earbuds_to_ps4_controller.pdfIn PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144438945/what_happens_when_you_cry_too_much_when_you_pregnant.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/f/69117801643.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_off0000d38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38F 5372 bytes
SHA-256: 215ae1a9f9490584cd0140b10bda378cd526d62a7fa8217971d005ab1fa9ef10
font_01_sfnt_off0000e5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CB 10884 bytes
SHA-256: 97068a3a1ccbb87d7dbb2f9b43d4cf3c6c1d52568b54f87156c3d705850c9e7e