Malicious PDF — malware analysis report

Static analysis result for SHA-256 5781bcfe73f6a58c…

MALICIOUS

PDF

78.1 KB Created: 2021-04-04 19:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fc6ab94c0cd665d08ffccd7a6d7f63f3 SHA-1: 44d91399372cad2ba4562d104ee7752d6d7f2ec3 SHA-256: 5781bcfe73f6a58cb860fb6f3bf7d1cc2475b066fd8a2fb7384b1a2794937038
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 0.9993

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 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://baarspo.ru/strik?utm_term=dell+xps+8300+motherboard PDF link annotation
    • http://zuregazezoral.mygamesonline.org/a_level_physics_roger_muncaster_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481278/normal_6065ab686aea2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367013/normal_5fccce3263951.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/59144375101.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499999/normal_5fcd12b01a908.pdfIn PDF document text
    • https://rodifeganugupi.weebly.com/uploads/1/3/2/8/132815003/wevenetuxudajerot.pdfIn PDF document text
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/marabe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421473/normal_6003543f5fc96.pdfIn PDF document text
    • https://xelavizagak.weebly.com/uploads/1/3/5/3/135325118/gires-rigizogolu-tivanir.pdfIn PDF document text
    • https://zapijuwubasu.weebly.com/uploads/1/3/4/8/134866543/7508121.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/jukewarasizapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377925/normal_600a4628bc767.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/zuguvoxoki/simcity_4_deluxe_serial_key.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/tosov.pdfIn PDF document text
    • https://0a01f052-6ee6-4bfa-868d-d2e49373b03f.filesusr.com/ugd/55f640_12a7e045313544d4bf516df166a85974.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bufexa/risk_of_rain_2_characters_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/mugutakugen.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_737c092c9d1045fda2c13871118f79b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugafebip/baldurs_gate_dark_alliance_3_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/anime_movie_terbaru_2019.pdfIn PDF document text
    • https://13cfbe10-32e4-4d7a-9072-8dbd3280e6b8.filesusr.com/ugd/994e9e_dfde1ad2828548a3b7dd9896de553c60.pdf?index=trueIn PDF document text
    • http://sutexuvidag.myartsonline.com/patazala.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_e8e3492e3c644a8caa71924967906ecf.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_off0000edac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAC 5904 bytes
SHA-256: 979a7ac04060a5934817446492233dcd1213e67e77250d78bd278fdb72477b31
font_01_sfnt_off00010192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10192 12192 bytes
SHA-256: 53fe3eecaf508330e293988dd2d261cbe52615352e8edb179e7f922416e2d936

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