Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbdd9df238f5ea0e…

MALICIOUS

PDF

79.4 KB Created: 2021-04-22 00:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56397c0d7e3a399016ab9dba27b3fc96 SHA-1: b9d45861677d48037d4311bf1ca0b991d743ff8b SHA-256: bbdd9df238f5ea0e288f03b6e59104f3a7c283986be001b65f15783302e18a75
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious sites. The primary malicious URL identified is https://vilenefex.ru/strik?utm_term=white+christmas+movie+trivia. While no scripts were extracted, the structure and numerous external links strongly indicate a malicious intent to redirect users. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://vilenefex.ru/strik?utm_term=white+christmas+movie+trivia
    • https://cdn.sqhk.co/rudolikube/heijeha/5641229511.pdf
    • http://xususebixaxix.iblogger.org/behaviorismo_radical.pdf
    • https://cdn.sqhk.co/vagekoxes/qlHhizJ/go_long_joanna_newsom_sheet_music.pdf
    • https://cdn.sqhk.co/xekemini/9k7VCyQ/nuteveselezizuz.pdf
    • https://cdn.sqhk.co/genopeno/p3jg8xa/download_game_dragon_hills_mod.pdf
    • https://cdn.sqhk.co/livefivepa/Bghifs9/3511317061.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/6eb1d6ca-7035-4714-a8a1-32feac7733f8/judirirosemazumipoduf.pdf
    • https://uploads.strikinglycdn.com/files/21c286ac-9a1a-4432-bbd1-4c92a96c2164/what_does_shipment_delayed_mean.pdf
    • https://uploads.strikinglycdn.com/files/6726cb88-4b2b-4689-84d8-ee6ff0c84259/16738333914.pdf
    • https://uploads.strikinglycdn.com/files/d0ae23a9-6efb-48d3-b6b0-9cc665d53734/fovalivugugamilupol.pdf
    • https://49884795-3b66-401c-adaf-b59e999553af.filesusr.com/ugd/8bd6c9_fed684668ceb446d9ca70867ba8983a3.pdf?index=true
    • https://s3.amazonaws.com/domegagowevag/sobuz.pdf
    • https://s3.amazonaws.com/jotogorurekuro/13253615820.pdf
    • https://uploads.strikinglycdn.com/files/48b0e178-c6d3-4083-bc42-3c2cd40ed8d5/what_is_the_texture_of_impressionism_music.pdf
    • https://uploads.strikinglycdn.com/files/9111d183-7281-4d11-addd-541141668946/45294908130.pdf
    • https://s3.amazonaws.com/rimepusox/12437697024.pdf
    • https://s3.amazonaws.com/wupuxus/how_to_breed_perfect_iv_pokemon_oras.pdf
    • https://s3.amazonaws.com/rujabepifar/dominion_tower_special_fights_guide.pdf
    • http://relimimukavewuj.rf.gd/29449819104.pdf
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_93d09d4a3bac4879a8aca4ff20021067.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebfb.bin
bde83170e85e665610f65be903b1e56b00393eaa1618eee65df20839b96abf52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 4764 bytes
font_01_sfnt_off0000fc2d.bin
f37733fd36dbf74ef95d2cc2cce1bb06be27a714f1126a3cbcfba37bb3672030		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2D 11144 bytes
font_02_sfnt_off00012205.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12205 4324 bytes

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