Malicious PDF — malware analysis report

Static analysis result for SHA-256 366f18b853745bd2…

MALICIOUS

PDF

84.1 KB Created: 2021-02-21 10:17:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ae4d68bea8f80f4f32f12f155240bd76 SHA-1: b562322c18dab9f915f7cab3138ef7eebca2a217 SHA-256: 366f18b853745bd265838a5e7cf9b7b6195c7c247ad2a3a3fea27fb37550a5e4
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule indicating a large number of external links, and a ClamAV detection for Pdf.Phishing.Trojan. The embedded URLs and the document's structure suggest an attempt to redirect users to malicious sites, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=journey+to+the+center+of+the+earth+moviesflix PDF link annotation
    • http://webdefilmizle.com/pusasatisixibaxisovadfbv8.pdfIn PDF document text
    • https://midatapeb.weebly.com/uploads/1/3/1/0/131070166/454956986f628.pdfIn PDF document text
    • http://dvigatel.guru/55721903596p5x58.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/lhbifhd/international_day_in_usa.pdfIn PDF document text
    • https://dopotalufiru.weebly.com/uploads/1/3/4/6/134601398/a0cd7d1e.pdfIn PDF document text
    • http://khanapoorti.com/94045564681ojh0b.pdfIn PDF document text
    • https://kedixusivazusug.weebly.com/uploads/1/3/4/8/134869684/0712ba.pdfIn PDF document text
    • https://batuputuj.weebly.com/uploads/1/3/0/7/130739628/78c5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478716/normal_601b4b8f9f67e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lepiwapugu.rf.gd/dell_optiplex_9010_sff_i7_specs.pdfIn PDF document text
    • http://rokodejufoda.rf.gd/december_song_sheet_music_peter_hollens.pdfIn PDF document text
    • http://vekujekodabudu.epizy.com/kulolevavamabokigivok.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/55323161090.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/back-_ups_pro_1000_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/84302579759.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/ruziwedujadukevedisedaza.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/android_9_for_galaxy_s7_edge.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off0000f892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF892 5340 bytes
SHA-256: ad54fdf1fd8f014e9a1452f6ab2a936b348e139d12bc9897f08dd5133b4f2543
font_02_sfnt_off00010a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9E 4244 bytes
SHA-256: 3590d28e3221aa19927bbd45157a1e8e5a5b9686deedfb4024acf831ba1106d8
font_03_sfnt_off00011b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5F 11548 bytes
SHA-256: 8e6afd1ac7b025163dffff70a996c158739a301c111b53c6f6731158a686148b

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