Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b0d7f92796e837…

MALICIOUS

PDF

84.6 KB Created: 2021-03-23 13:15:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73fc07ae94637208f14cfdb9cadf7ed5 SHA-1: ead7331afff73c1553b6daed93c7f77de6ab3f53 SHA-256: 74b0d7f92796e8371ec87d0608d3dc34f32cf6a93036e2c29566b04a4fa63cf0
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malicious content distribution scheme, as indicated by the high ML classifier score and ClamAV detection. The presence of a large number of external links, including a link farm, suggests an attempt to manipulate search engine results or redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious intent, likely involving the distribution of further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/award?keyword=alternative+fuels+ppt+pdf
    • https://gewopisoxow.weebly.com/uploads/1/3/4/3/134306678/rozul_jimesowumuzu_duxosusodasugu_lagurax.pdf
    • https://cdn-cms.f-static.net/uploads/4392659/normal_60124fa067f11.pdf
    • https://bejitukinerebi.weebly.com/uploads/1/3/4/8/134890105/suwimid_popolifamizi_labeneporaxiret_vadewunuzam.pdf
    • https://cdn-cms.f-static.net/uploads/4492593/normal_601f8640e4091.pdf
    • https://kerawidirara.weebly.com/uploads/1/3/4/7/134746453/4310776.pdf
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/zonizedoki.pdf
    • https://jipubegu.weebly.com/uploads/1/3/1/0/131070098/2560912.pdf
    • https://cdn-cms.f-static.net/uploads/4387817/normal_604b878d2464a.pdf
    • https://cdn-cms.f-static.net/uploads/4447916/normal_5fe7e22e49cfc.pdf
    • https://cdn-cms.f-static.net/uploads/4377678/normal_6051528a2f234.pdf
    • https://zexotanus.weebly.com/uploads/1/3/0/8/130873712/lumejozuzigozad.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_13b85d9ead2c42779f8378ce92b7ea41.pdf?index=true
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_df1d6db97d544b01a8665973944f233d.pdf?index=true
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_7595e181f6da4bf4bf014452805bbdec.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9397e5de-c767-4cf0-b556-6f0497ca58d0/robert_kiyosaki_business_of_the_21st_century.pdf
    • https://uploads.strikinglycdn.com/files/e40cd4d2-c034-43d9-ac43-4db124693e55/99011402305.pdf
    • https://uploads.strikinglycdn.com/files/ddcf72ff-8474-4c93-bedc-84c484c69208/donerefiluselapopidazur.pdf
    • https://8ca15cf9-c5bf-4329-906a-32df3c7b5ab7.filesusr.com/ugd/4ca7f5_838f676b590b4802826058adf3daa8f7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1bcb6404-d04b-4992-9676-03c8ee0908d8/14821944362.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102d1.bin
18da905e1a4698755a100798b7dabffb417fe4f1b541bf0c5751d076c4faa72e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102D1 2460 bytes
font_01_sfnt_off00010d9e.bin
74e7c72db21ec82cc6886de5da32c6b36a09e954642d1ef6a6b732d41643ca00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9E 5084 bytes
font_02_sfnt_off00011f01.bin
7569336b89635c740a7d735817a9bcc3605891b2de3eb46bdff4281d5ff715a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F01 11220 bytes

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