Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9bdcfff60cc1dd7…

MALICIOUS

PDF

82.1 KB Created: 2020-12-22 16:25:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a4e6bbc9e32d8c5a68785b3726576a6a SHA-1: d6a327f46f1e40050f185d4d55650a79bbe1776d SHA-256: f9bdcfff60cc1dd7280cc77a76ef2ae8288ac01c4280734e0d84dfd92a04cf30
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a 'PDF_SEO_LINK_FARM' and a high ML score, indicating a malicious classification. The document contains numerous external links, with one pointing to 'https://trafficel.ru/123?utm_term=cape+results+2017', suggesting a phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of an attempt to direct users to potentially harmful content.

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://trafficel.ru/123?utm_term=cape+results+2017 PDF link annotation
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/3cda218.pdfIn PDF document text
    • https://www.cxc.org/student-results/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/liwafo/rijerukupiwedoperu.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/dogelesawuwipologasazejil.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/household_linen_sheets_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/63268605206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c26bdceb-f04e-4d25-ad11-39f5fa3e981f/12524866536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5784c9dd-595a-4d3f-bab6-d3e39e0dea38/negejupoji.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5054dc6d96458363c81e8/t/5fc9f4909309303fb8351795/1607070869284/dawirav.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfce5e8715ea0dc9dc5658/t/5fe09f7c2baf317dc3c8b7e2/1608556412438/ritikapunonenerefufi.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/puvefule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69cb2fb5-c936-4b09-9580-5933f777c33d/dexigumugijuretek.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/aplicativo_netflix_android_4._1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60e952cb-047b-480d-be99-578a4a84c297/introduction_to_categorical_data_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/jaxilebimasanon.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/sejefunulanabagajede.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D8 4860 bytes
SHA-256: 7b517d406d8267baf9ecb42fb6070f40f4d8d1ab618cebffbcac85d481310f97
font_01_sfnt_off0000e482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE482 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0000efe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE5 11412 bytes
SHA-256: b55bd7d71d30bbc325f243d191f5c0e1463d45a15187611d9139e3b0e2db5ca8
font_03_sfnt_off000116af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AF 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
font_04_sfnt_off000124af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AF 6332 bytes
SHA-256: e544967e4e042c7d758910a8213af4b68a8412b63f6dfef2d4763616da32a11d

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