Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd61059d29991ec…

MALICIOUS

PDF

82.8 KB Created: 2021-01-22 22:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2a064aa4a618ece7029fb9bcc88e4606 SHA-1: 9b8d41922d7a3d4437bf0639d8e3e24db97e5800 SHA-256: bdd61059d29991ec6ec503ad7142d0cab2b7751933be9d7a5838192d9e47cf43
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, indicative of a link farm or SEO spam operation. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports malicious intent. The document body, though heavily obfuscated, contains keywords related to "hack apk", suggesting a lure for potentially malicious software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffi.ru/wb?keyword=smash%20chase%20hack%20apk PDF link annotation
    • https://jowanubeso.weebly.com/uploads/1/3/5/3/135399775/pirezix_kenupukarif_lafosikazevum.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/yM9haV2/ptcl_bill_check_online_without_account_id.pdfIn PDF document text
    • https://cdn.sqhk.co/mekekomubun/Q2heL6b/poly_pop_3d_sphere_puzzle_solution.pdfIn PDF document text
    • https://terajorekefiko.weebly.com/uploads/1/3/1/4/131408772/mevafowakazarav_livode_nudokulevusa.pdfIn PDF document text
    • https://site-1176958.mozfiles.com/files/1176958/wusiwoluxojunusiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/legifenobir/6OU0hdq/81762238505.pdfIn PDF document text
    • https://site-1240303.mozfiles.com/files/1240303/55872346314.pdfIn PDF document text
    • https://zivazumuwekaf.weebly.com/uploads/1/3/2/6/132695746/1303704.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/jgjgj5B/upper_respiratory_infection_definition_medical_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/namaboniki/yKleghs/66004747162.pdfIn PDF document text
    • https://cdn.sqhk.co/lutaxudepoje/FXHheMk/sibex.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/FbULsjc/invaders_from_the_planet_moolah_slots.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/nopofikudazubesedi.pdfIn PDF document text
    • http://mesesoriran.epizy.com/jemejijiwatixiwajaw.pdfIn PDF document text
    • http://buvodadixasiz.epizy.com/fuzazijakajiximigeguxa.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/aristoteles_filosofia.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/38235056819.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/badmaash_company_hd_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/fubasokivili.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75A 4656 bytes
SHA-256: ca2fa012560a7fcceaff3555361a57f932235c57de0d8ae05f3af231ee18839a
font_01_sfnt_off0000e70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70A 3024 bytes
SHA-256: cf5ed4f450e5fc1fa31c8ac31b5dbd05637a4ba05cdfa332ae769b600578e534
font_02_sfnt_off0000f238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF238 12232 bytes
SHA-256: 0724810f0b06df6e231e5515f701428af3cec3b29c67a34faf82fcf8b7e8bfca
font_03_sfnt_off00011a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A66 16076 bytes
SHA-256: 3edc706225c94b236b03d98948a88fece3d4471aa3ed357ddaecbdd9d2c92ee1
font_04_sfnt_off00012f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333