Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2b28ff0d7c20c3…

MALICIOUS

PDF

81.0 KB Created: 2021-03-09 01:22:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71c4e2f615f584d6b34ccc8815f835b5 SHA-1: 25dfbdc185009ae82969390197d2415eff4adf56 SHA-256: 2c2b28ff0d7c20c30fa033001c26c8d6fd98ae1d40f661542ebad7f5c094dd84
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farms to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically identified as a phishing trojan. The embedded URL `https://soxebez.ru/123?utm_term=baby+birth+announcement+photoshop+templates+free` suggests a lure related to design templates, likely to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=baby+birth+announcement+photoshop+templates+free
    • https://pimefukidipobe.weebly.com/uploads/1/3/4/0/134096137/2252187.pdf
    • http://nasporte1.fun/nopaxiwodiputumaxppm3.pdf
    • http://wirelessinfo.ru/autosomal_recessive_pedigree_amoeba_sisters_answers07ag0.pdf
    • https://duxataravur.weebly.com/uploads/1/3/4/0/134017775/jozedu.pdf
    • http://pestore.pro/xafadijadabinisevusazidapa8sil.pdf
    • https://xoruvuxana.weebly.com/uploads/1/3/2/6/132696063/3dc28e.pdf
    • https://judunelikirolo.weebly.com/uploads/1/3/4/3/134375477/ccb7b5f22bafbe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_756d22ff60d4474c97ddff546ce7451c.pdf?index=true
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_05c3477bf0af45a6bfe7e9125a9e4e96.pdf?index=true
    • https://s3.amazonaws.com/sizabo/57189618906.pdf
    • https://uploads.strikinglycdn.com/files/92bde4b6-20d9-481c-a08f-6b11ba9b13ca/66010624401.pdf
    • https://s3.amazonaws.com/wujixus/aspirin_prophylaxis_in_pregnancy_nice_guidelines.pdf
    • https://s3.amazonaws.com/fajetufekejo/mechanicus_glyph_guide.pdf
    • https://uploads.strikinglycdn.com/files/53898b89-f077-4c35-89a0-b0ca012d307d/international_business_geringer.pdf
    • https://s3.amazonaws.com/ditiruz/153705839.pdf
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_eca6fc626b1d4e87a14c3a3b8327ad30.pdf?index=true
    • https://uploads.strikinglycdn.com/files/de301c5a-b04e-40e6-b88e-dce2cd8482d8/dias_feriados_enero_2019_puerto_rico.pdf
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_7f07ede057a849cca19795dde3c77861.pdf?index=true
    • https://s3.amazonaws.com/lijulijowivaze/benobito.pdf
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_1e4731cf587240e081ee853a1a89bfc3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/28ebe155-1227-4b87-8ce4-3d162a611cc4/xiwaz.pdf
    • https://uploads.strikinglycdn.com/files/ccd7eb02-09d5-413c-a105-ca4ab72aa8d7/a_christmas_carol_1984_characters.pdf
    • https://s3.amazonaws.com/dekogamik/91347108182.pdf
    • https://s3.amazonaws.com/fidefofudi/cashflow_quadrant_espaol.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_off0000fd52.bin
46bc4b189880166da7478858f2d4e29a83d980798d58bb2f8bbb43e7512a20a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 5544 bytes
font_01_sfnt_off00011009.bin
54e5baf7622296a1d9ee9c99f6753e1379f3e691d9104d8153991ed72246a5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11009 10840 bytes

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