Malicious PDF — malware analysis report

Static analysis result for SHA-256 76ea2ff6baa14763…

MALICIOUS

PDF

75.1 KB Created: 2021-03-24 09:28:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c24de78116b8b8c5bef69426a240570f SHA-1: e5933a7bf2069a5c8731e06ebbe372408b9b0af3 SHA-256: 76ea2ff6baa14763d56f93ded3ed10188b6d00e911dd05aab6da4b10c956e3fa
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, pointing towards a phishing or SEO spam campaign. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://druttle.ru/award?keyword=breakthrough+advertising+eugene+pdf PDF link annotation
    • https://momaduse.weebly.com/uploads/1/3/4/8/134895420/6154922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500679/normal_5ff5b247b262b.pdfIn PDF document text
    • https://vukajikabazaxeg.weebly.com/uploads/1/3/4/7/134711597/toxidigowepaw.pdfIn PDF document text
    • http://dominis.xyz/is_chick_fil_a_grilled_chicken_healthy9nyop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381532/normal_5fe2280a8f93d.pdfIn PDF document text
    • http://mantenancie.com/67835196044gv6yu.pdfIn PDF document text
    • http://dominis.xyz/53971318506t9br4.pdfIn PDF document text
    • http://prognoz-football.club/mibab43rkh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475197/normal_5fcc2760e952d.pdfIn PDF document text
    • http://axacheat4.xyz/dewilulemiwap94kpo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_604cd07313c85.pdfIn PDF document text
    • https://dimejozetef.weebly.com/uploads/1/3/1/0/131070151/viruponidod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/piradi/seek_and_destroy_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/voponomorakedazoboniti.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/ccure_9000_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/71547913568.pdfIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_0c29a88a0ac248deab4e916b9e55bb39.pdf?index=trueIn PDF document text
    • https://3485775d-af35-4505-8fb4-f6750f575e04.filesusr.com/ugd/42f18e_580a897e99ab4547b48add1b744f29fb.pdf?index=trueIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_8e2b8ef3e39e46aca11485167b62c92c.pdf?index=trueIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_1257288465bc49c19999296374c09752.pdf?index=trueIn PDF document text
    • https://3c86e5df-9a55-47dd-9d5b-c207b25ec6cd.filesusr.com/ugd/72bf36_9db89261282543f1b9b8aadc846656a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lofese/kaluxubaf.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_off0000e3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F1 5444 bytes
SHA-256: da26873bad8b7a8556340dfc517137af03402947c2e5077041ebfb2ff4836560
font_01_sfnt_off0000f67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67F 12876 bytes
SHA-256: cfa53f01e23880515e7d339fc11403f5723524978edb73a65c8ff7079cc0e5a1

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