Malicious PDF — malware analysis report

Static analysis result for SHA-256 31a7db51ac86ca0c…

MALICIOUS

PDF

79.3 KB Created: 2021-03-26 07:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6f5575d5933d0e5f72b5b2c4e59eb2b1 SHA-1: 3e763d5b8c0ec30db8e6900ae843d8fe16bca546 SHA-256: 31a7db51ac86ca0cc1b521ee5b1bc1e04ec5ce8b6332bdb0641e432e6f10fe57
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external links, with one specifically pointing to 'maypoin.ru' and another to a 'weebly.com' domain, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or scam attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://maypoin.ru/wix?keyword=silver+wedding+anniversary+colours PDF link annotation
    • https://rosanibo.weebly.com/uploads/1/3/4/8/134873488/linibapuze.pdfIn PDF document text
    • https://velotukuzikud.weebly.com/uploads/1/3/4/7/134722024/5864e.pdfIn PDF document text
    • https://vigakamodibit.weebly.com/uploads/1/3/4/7/134770941/xijukogime_kupikek_mofirotig_zifojenawebidip.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/nevarawilijurevizeziwenin.pdfIn PDF document text
    • http://naguvogegexaze.22web.org/dosipajipixu.pdfIn PDF document text
    • https://sifavebizibi.weebly.com/uploads/1/3/4/0/134040704/powivag_xopukaka_xobazeko.pdfIn PDF document text
    • https://luweguvilu.weebly.com/uploads/1/3/4/5/134595963/4357143.pdfIn PDF document text
    • http://masuvanoleseg.iblogger.org/41230791791.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
    • http://wowutuzineko.myartsonline.com/zobekakebegaloneva.pdfIn PDF document text
    • http://vogepaxita.rf.gd/game_pokemon_fire_red_pc.pdfIn PDF document text
    • http://pulilidason.epizy.com/nigotexego.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/how_much_does_a_pr_professional_make.pdfIn PDF document text
    • http://tojederetesez.epizy.com/wogiwizedusotosewuket.pdfIn PDF document text
    • http://livirava.atwebpages.com/vomawexajoza.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/pedogirevupune.pdfIn PDF document text
    • http://mirivukavezigo.epizy.com/61418491467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894d957f-9245-442c-8b1d-4f6a785dd589/7814656959.pdfIn PDF document text
    • http://bumerezuwo.epizy.com/common_core_math_worksheets_exponents.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/el_cerebro_humano_y_sus_partes_y_funciones.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/alkaline_diet_recipes_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/29274422878.pdfIn PDF document text
    • http://josetevuj.epizy.com/el_arte_de_la_seduccin_pelcula_reparto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3d0f587-43f0-477f-963d-338e1cd7fe5b/dungeons_and_dragons_5e_monster_manual_download.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB56 5268 bytes
SHA-256: b191a9298cf4e48bfba2dffa3dd25eba8965661bc8ac41db2526ea5d8491bd5a
font_01_sfnt_off0000fd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4C 10708 bytes
SHA-256: f9eefddca25746ff056a86e9ff5124333bcd5287c6ba0a0ecc115abc6722fac9
font_02_sfnt_off000121aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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