Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2515c73b0bc48b8…

MALICIOUS

PDF

88.6 KB Created: 2021-04-15 10:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6c6148a1a18fcf8f502b5442258712e4 SHA-1: 1370f17756d92d9336370656946d1667c341a4fa SHA-256: d2515c73b0bc48b8608a8704c026893de79e182dc6490cd7dea0bf86b1e37fbf
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/strik?utm_term=how+a+man+should+treat+a+woman+meme PDF link annotation
    • http://purigoguwoz.22web.org/knee_pain_relief_exercises.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408981/normal_5fdfaa4a758a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483591/normal_604cfa6580073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417220/normal_60146b0486fd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469350/normal_60388d177e6f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494877/normal_604f82eebc3d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://00f02ae0-031c-4cf4-85c3-86bbc6d7deb2.filesusr.com/ugd/13f2e4_ed0d0cc2267547089cde3b866e2e4eb1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/spreadsheet_maker_in_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/degivi.pdfIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_63cde8cf571b4a279e17452579ed7888.pdf?index=trueIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_1fff2f56d8be4693ae02faca477cfdd7.pdf?index=trueIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_2d0e3fd68e0240418a477a1c5d10b0ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bogijexu/97535151847.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/loril.pdfIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_163512c2d9ee424690286a49361f715c.pdf?index=trueIn PDF document text
    • http://bidadefaj.epizy.com/secret_video_call_recorder_apk.pdfIn PDF document text
    • http://konajif.epizy.com/kendal_ultrasonic_cleaner.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/algorithm_in_programming.pdfIn PDF document text
    • http://vevemaj.rf.gd/baranofawufok.pdfIn PDF document text
    • http://zururoda.epizy.com/rojopokerit.pdfIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_f91b9f1e79f249fb954a299c9885dfb5.pdf?index=trueIn PDF document text
    • https://b1394492-4877-47b1-8bf2-e962974baa99.filesusr.com/ugd/3e4b7a_79bec196a3a24858af8a46ae15ca3ce4.pdf?index=trueIn PDF document text
    • https://154530d8-637b-49d0-b90a-43bf07a176fb.filesusr.com/ugd/59359a_a03c0bafb4604d439c39044978de2156.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE4 5120 bytes
SHA-256: 1d798cd70e0c47a64e9bb8931b3572b97891ea868fbc811978fd931039ab5783
font_01_sfnt_off00012d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2C 11768 bytes
SHA-256: 9bd08074a0c283343cba882dc3a2e170adf87830e947b7e7818e6129fe268882

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