Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59d21a3645e4e01…

MALICIOUS

PDF

85.8 KB Created: 2021-04-25 14:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: de3eb8980e6b2e5f05529b142cd5f3d5 SHA-1: 9132c4ce7b1200dc75db1f35671ed0540454bfe2 SHA-256: b59d21a3645e4e01d2261ec0dc5f1eff1499f6d773deaf97eea60ec035d53488
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 0.9996

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://xajibur.ru/strik?utm_term=does+the+witcher+switch+between+past+and+present PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465941/normal_601bdfba3322b.pdfIn PDF document text
    • https://cdn.sqhk.co/nonatedogo/cVgihfQ/15944315262.pdfIn PDF document text
    • https://cdn.sqhk.co/bikawegaj/hyiiif2/candy_crush_saga_online_free_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368788/normal_5fdadea90be78.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/aaphhii/60925109395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472776/normal_6020d37fe7ab0.pdfIn PDF document text
    • https://cdn.sqhk.co/nefowumik/D6EhclU/musapomagelofivomu.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/godewumazek/what_are_the_major_beliefs_and_practices_of_christianity.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/sixixalu.pdfIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_6a962542b8124960bfe694cb3c94c479.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tutasujal/smackdown_here_comes_the_pain_ppsspp_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/noco_genius_10_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/blackmart_app_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/have_yourself_a_merry_little_christmas_chords_piano_jazz.pdfIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_434411f990bc440ebc8d7878d336ade9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/72615226582.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/training_committee_meeting_minutes_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/magazine_ads_template.pdfIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_b1c5db8a599d45e7a166ee6d22c0f052.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/50791998075.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/cuales_son_las_comidas_que_puede_comer_un_diabetico.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/lafesatugul.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_off00010ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF7 5360 bytes
SHA-256: 9aa66f8c71794828e9af91157f214048fe48c1aa9e855b470680be609ba77c93
font_01_sfnt_off0001213c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213C 11592 bytes
SHA-256: ad30bfb3fe43217c58b338a3fa2cd3589b75754c2a2f00fba9699d53f12e004c

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