Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dac61e38cad6b0c…

MALICIOUS

PDF

80.9 KB Created: 2021-04-18 19:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f3bf6c64a3d07d3e192de101b77dc030 SHA-1: 5e73277b75ca49b331db93a2c30dfff59326d5da SHA-256: 2dac61e38cad6b0c5c6d04d857f721c6cefcf9fe8bf026421347214047061dd8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://xajibur.ru/strik?utm_term=price+of+42+inch+sub+zero+refrigerator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488346/normal_602fed1595bd0.pdfIn PDF document text
    • http://maxirem.mygamesonline.org/agilent_gc_columns.pdfIn PDF document text
    • http://kufukoxeb.22web.org/xotik.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/mutotoxixofe.pdfIn PDF document text
    • http://fuwiduwoxobol.mygamesonline.org/brick_masonry_work.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/satajivetijawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_606005ce4ed04.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/96964186548.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/hallelujah_piano_nuty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530323/normal_6060270928af4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zilokujidetomo.epizy.com/spider_man_comics_ebook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/reference_sheet_based_on_cell_value_vba.pdfIn PDF document text
    • http://xutenujute.myartsonline.com/dayton_tradesman_20_drill_press_model_3z919_parts.pdfIn PDF document text
    • http://gototura.myartsonline.com/angels_robbie_williams_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/what_is_the_oldest_greek_myth.pdfIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_84b5dbb1b68341e8952ab2c51bd69cdc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/gaworarirug.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/10367511373.pdfIn PDF document text
    • http://kokomato.epizy.com/76245815572.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_98140a3a34aa4d7e8d2aacbaca3a3ad5.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD78 5520 bytes
SHA-256: 7973ba0d0b61fc0525c4d8de39916d0840350ad60cf612b52fde7b0f2f9cab21
font_01_sfnt_off00011048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11048 11508 bytes
SHA-256: 57b64d7d4a22b727ffe25cc4cdf205de33ca2ba264ab398d1c6b2038e0655b42

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