Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1ab5ec1aead8bd…

MALICIOUS

PDF

78.6 KB Created: 2021-04-02 19:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74ef683b8ecfae157ded0477d4a2d60f SHA-1: 57b277d92eee0ae7a7a6dd3f5a22739673168110 SHA-256: 1d1ab5ec1aead8bd7e0b4df69db999d6b941616b7d967508fdce3560cb859865
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The presence of a large number of external links, many pointing to potentially malicious domains, suggests a link farm or redirection scheme. Crucially, the file contains an instruction to disable security software, a strong indicator of malicious intent to bypass defenses and likely download or execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://resalured.ru/award?keyword=autodwg+pdf+to+dwg+converter+serial
    • https://cdn.sqhk.co/rarukaboz/hcicFjj/39284864428.pdf
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/2104632.pdf
    • http://pokemonrivals.online/fanigidofusewaxkwsz.pdf
    • http://kungfumalibu.com/enterprise_grammar_4_answers_key2tjpg.pdf
    • https://malolikekex.weebly.com/uploads/1/3/4/7/134718462/dd9c47101b0.pdf
    • https://rinizazekuke.weebly.com/uploads/1/3/4/0/134012784/pedirikeza-lubavej-fonotisudonuget-dorago.pdf
    • https://lofefogurabu.weebly.com/uploads/1/3/1/1/131164054/jipetar.pdf
    • https://webutukokixomuw.weebly.com/uploads/1/3/5/3/135317122/2123285.pdf
    • https://cdn.sqhk.co/letareximo/bhhhiie/tumblr_login_issues.pdf
    • https://cdn.sqhk.co/vifutetax/cjhjfid/strategy_vs_tactics_chess.pdf
    • http://dipenoguzel.sportsontheweb.net/venn_diagram_questions.pdf
    • https://kawapojironene.weebly.com/uploads/1/3/1/6/131637385/laxamuveki.pdf
    • http://nikaold.site/how_much_do_internal_auditors_earn_in_south_africa_per_monthfi6gg.pdf
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/golobajeponotubidek.pdf
    • http://classicalnaturally.com/sozaluganisojedvec4x.pdf
    • https://cdn.sqhk.co/vusunuvaka/6hcH8Ds/rufaxovozuzu.pdf
    • https://cdn.sqhk.co/ravusigi/ja0yUih/xajosonopafifapetitusoj.pdf
    • http://bonifacy.site/xozizinojupna8q6.pdf
    • https://bonorira.weebly.com/uploads/1/3/5/3/135346760/c38d3542.pdf
    • http://fepaporipevari.mypressonline.com/merriam_webster_visual_dictionary.pdf
    • https://beluxavin.weebly.com/uploads/1/3/4/5/134507718/midujuwijurapasi.pdf
    • https://rosujukasawi.weebly.com/uploads/1/3/5/3/135301647/3373573.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/da0a1b92-d2f0-4350-ae2a-6638aa9045cf/walmart.ca_beats_solo_3.pdf
    • https://uploads.strikinglycdn.com/files/17889ae2-a888-4618-ab1e-12457072d89c/casio_tough_solar_illuminator_manual_espaol.pdf
    • https://uploads.strikinglycdn.com/files/fca13378-6753-4d85-81fc-153819481be5/the_lord_of_the_rings_the_hobbit_the_argonath_book_file.pdf
    • http://kagijido.myartsonline.com/convert_scanned_to_word_document_online_free.pdf
    • https://uploads.strikinglycdn.com/files/5c6c4dae-4eba-48ba-a3c2-34516b0e821b/20087855301.pdf
    • https://uploads.strikinglycdn.com/files/576ea432-34e2-4a55-a161-b09eb238a1ac/dixuge.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f461.bin
dfa3be4f3224cea93b8dc530cdc3eaca138d9bc0b63da532d12a6e5b31b3ae10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 5464 bytes
font_01_sfnt_off0001072c.bin
f3f8b94cabe3d44d70bd99f046be1f27ac81c8cbebc25a4607ee794823a62833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1072C 11048 bytes

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