Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2824fbb14221ab6…

MALICIOUS

PDF

75.3 KB Created: 2021-03-10 11:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9b4bc5f128d6020e8e9535c12fdcd255 SHA-1: ad913a66d6bb64f771f930e5980b1bfdfc4c1da8 SHA-256: e2824fbb14221ab622a90075dc73bfcdb9fe307b21b4d59d8aa4f8843dfe6e78
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though truncated and obfuscated, appears to be a lure related to 'clergy housing allowance worksheet 2019', aiming to trick users into visiting the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=clergy+housing+allowance+worksheet+2019 PDF link annotation
    • https://nodajalij.weebly.com/uploads/1/3/5/9/135990600/zofelozubinuf_bazofof_kefil.pdfIn PDF document text
    • http://memowelubi.mygamesonline.org/44456137815.pdfIn PDF document text
    • https://wefizaxire.weebly.com/uploads/1/3/0/9/130969527/3163336.pdfIn PDF document text
    • https://namekabesomi.weebly.com/uploads/1/3/4/6/134668803/d210073e3ba.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/jadere/17848429294.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/20362649896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/666df316-7538-4754-ac08-a4ceed572bf1/18256805466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8be2080-d34f-4873-8d3c-471dc97869b0/57330683395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/260d3ebb-6b6d-4755-b11c-a6c0ae7ba15c/54700094747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a11aca-63d4-40bd-922a-c6a42b55b5cb/autocad_freelance_websites.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/the_white_tiger_review_rajeev_masand.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/joragagosajibibixobujunuf.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/55353763330.pdfIn PDF document text
    • http://wugetad.myartsonline.com/quartz_2d_programming_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc5f74f-450f-4d03-9b48-c493a706d27a/rujidapanekoxibugumuzato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/398330d7-8958-425f-8a25-0f0e3f98789c/weber_kettle_grill_replacement_grates.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_off0000e8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DC 5704 bytes
SHA-256: af2be816d0fb33aacfde4c1b1e7d4fc7b26dae1fb5d601c00921d6ce6ae0f43f
font_01_sfnt_off0000fc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5B 10516 bytes
SHA-256: 96df368a7b8475cfb469c8de596975f26b2857541e5676aabe3ae1e3943309e7

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