Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf36aea0aeed4ef…

MALICIOUS

PDF

86.1 KB Created: 2021-03-14 13:58:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e887d301550677341be87f969c11faf3 SHA-1: 2606bf12b3b070077d4cc1b89a61f7a5271c1e0c SHA-256: 8cf36aea0aeed4ef8788ada685472aeb4e57ef5c5d6cac34a36f70e0d0d0c529
146 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a callback phishing scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous external URIs, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of multiple suspicious URLs and the callback lure strongly indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://zajinet.ru/strik?utm_term=car+charger+for+doro+phone PDF link annotation
    • http://ririzobe.medianewsonline.com/87446527010.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/56718767755.pdfIn PDF document text
    • http://kevebofuru.medianewsonline.com/lerogexite.pdfIn PDF document text
    • http://jirapunobos.22web.org/how_to_rappel_down_a_rope_in_uncharted_4.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/rod_oa_rotates_counterclockwise_with_a_constant_angular_velocity_of_4_rad_s.pdfIn PDF document text
    • http://kusufuxufatup.getenjoyment.net/18753283355.pdfIn PDF document text
    • http://zatuzosej.iblogger.org/pidajoguputegaxezejod.pdfIn PDF document text
    • http://xoxapepagaxon.mypressonline.com/90848844179.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bogesib.epizy.com/36567492909.pdfIn PDF document text
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_8195504a8a9d4da9b2f12c2809ee424d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/78135f83-5d12-4c0b-a33f-e381ccc80057/pejugime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b6b0d78-c94c-4a03-bef5-19e63b960e96/what_can_i_do_with_amazon_fire_stick.pdfIn PDF document text
    • http://satuwegalenez.epizy.com/project_management_in_practice_5th_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6509d8c2-f872-4c0d-8e04-c3be55b9398f/4233325227.pdfIn PDF document text
    • http://wotiputega.epizy.com/breaking_the_habit_video_song.pdfIn PDF document text
    • http://vawupebudifi.rf.gd/56977448443.pdfIn PDF document text
    • http://xumomevafuvozup.rf.gd/auditoria_de_sistemas_vs_auditoria_informatica.pdfIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_d54dcbe79b7a47319a44710398b3633c.pdf?index=trueIn PDF document text
    • http://govabipisu.epizy.com/major_pentatonic_licks.pdfIn PDF document text
    • http://ruruwuvatokatal.onlinewebshop.net/kitigewebemerofinovige.pdfIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_943d88a57d4b48cbb17753691a637556.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f27161-90dd-4998-89e2-6fb26abe08d4/the_selection_series_book_3_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f70dde-752e-449c-8a3e-cf1ce58703d6/75771054841.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11401 5112 bytes
SHA-256: 10af73d821b82b4598a4da795dcfeb7866a1add72b0b9a7fa89f0ad91cfe3166
font_01_sfnt_off00012561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12561 11216 bytes
SHA-256: 2876798a61db68d04104d0702e5539b5f231fc29dfbfe8f2f810839b5906de72

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