Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d35922600873bc9…

MALICIOUS

PDF

82.9 KB Created: 2021-04-08 00:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 43522b61a0107ad9a667ca50af1cb057 SHA-1: 4dabb6fd55ab76f83856abed01f7827b65070f67 SHA-256: 2d35922600873bc9f5ebd146ab810d8cee80c959aea85d92f262f44d52cd9707
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://zajinet.ru/wix?keyword=realidades+3+chapter+4+vocab+pdf PDF link annotation
    • http://minuette.me/willy_wonka_and_the_chocolate_factory_behind_scenesvd4cp.pdfIn PDF document text
    • https://venonaneguwar.weebly.com/uploads/1/3/5/3/135398509/c0818367.pdfIn PDF document text
    • https://nopiviwefimak.weebly.com/uploads/1/3/4/7/134708781/pavugumebi_niputuram.pdfIn PDF document text
    • http://csxmoney.info/werupidoxedamironapnx860.pdfIn PDF document text
    • http://tublitalia.fun/xenuworetutafohxwrx.pdfIn PDF document text
    • https://rimovume.weebly.com/uploads/1/3/1/4/131452953/tobefon-migawamodiguk.pdfIn PDF document text
    • https://fuwiwidiwijidex.weebly.com/uploads/1/3/1/6/131637339/260996.pdfIn PDF document text
    • https://lawejuja.weebly.com/uploads/1/3/0/7/130740077/nivomuwejuvipuvi.pdfIn PDF document text
    • https://bufuxilanu.weebly.com/uploads/1/3/4/4/134402831/mogobatipipo.pdfIn PDF document text
    • https://juwaxevepatasi.weebly.com/uploads/1/3/0/8/130874094/9595ff024.pdfIn PDF document text
    • http://habercigo.com/73366122421zpsf4.pdfIn PDF document text
    • http://wemexuj.22web.org/wepifo.pdfIn PDF document text
    • http://dress-russia.ru/que_significa_linea_en_las_artes_visualesuapm5.pdfIn PDF document text
    • https://nepexinis.weebly.com/uploads/1/3/1/4/131438592/94811.pdfIn PDF document text
    • https://vebuxevofarina.weebly.com/uploads/1/3/4/0/134013543/1a989df28c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_d4e10aca5d344069bc24f6a3c57afbb6.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_60ad02934bee445d95df4d7dc1858130.pdf?index=trueIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_9cdf832f4cfa463c9339358f01e2265a.pdf?index=trueIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_e9633638a1cc4f51877c1de7d63719fc.pdf?index=trueIn PDF document text
    • http://gozadowosib.rf.gd/surah_ar_rahman_rumi.pdfIn PDF document text
    • http://kofikirigor.rf.gd/ronuxi.pdfIn PDF document text
    • http://xejojud.epizy.com/nofiti.pdfIn PDF document text
    • http://dilutevanu.epizy.com/aruba_clearpass_onguard.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_off0001036c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036C 5700 bytes
SHA-256: 8581dfaa0a149b3e523c6e12709c988ca490703bec02d57179a492bbf905fb52
font_01_sfnt_off000116d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D3 11000 bytes
SHA-256: fb93d672f7fb5d68b05aac1dd3765cf64b26862c583ca3f588fbac37b6c6a886

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