Malicious PDF — malware analysis report

Static analysis result for SHA-256 154e7846a0d1bd9b…

MALICIOUS

PDF

76.0 KB Created: 2021-03-23 06:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e062ad778ebf12f30adc69eaa149cdf5 SHA-1: 104618de0506f765366ebc0cfac1fe03aa738b05 SHA-256: 154e7846a0d1bd9bc5a606e150d6e552230d8f91b8e84e66b8e4d542b2ddfaa2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://resalured.ru/123?utm_term=redundancy+counter+notice+letter+template PDF link annotation
    • http://senteber.site/420013458126f965.pdfIn PDF document text
    • http://upgrade4me.com/lowisotanusosivorutumoxcm7u.pdfIn PDF document text
    • https://xebagamalod.weebly.com/uploads/1/3/1/3/131383607/8122785.pdfIn PDF document text
    • https://numusebitekamun.weebly.com/uploads/1/3/4/8/134871234/xutowuxajibuz.pdfIn PDF document text
    • http://tryse.xyz/donategixixunee7xxw.pdfIn PDF document text
    • http://jsexj.fun/77704426562t1f9g.pdfIn PDF document text
    • http://autobaff.xyz/dexozidopudaganikobanemjs1k.pdfIn PDF document text
    • http://amaryllis.space/xumuwomunujereljo61d.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/215604.pdfIn PDF document text
    • http://limons.space/kirineloguseliluxegurofhqrdr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wiwosotu.myartsonline.com/whirlpool_wmh76719cs_door_switch.pdfIn PDF document text
    • http://nakarajibap.myartsonline.com/good_ar_books_for_3rd_graders.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0bb6123-135d-4998-8d79-468ac944d7f7/dafirim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e395cc13-5bc1-4639-95af-02cb52c0f72b/how_much_is_procreate_for_ipad_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d11a4d94-19d2-4666-874b-35597086a93c/samsung_appliance_repair_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8515e8d5-ef19-4b59-9df2-a907d3f80a5e/87786234781.pdfIn PDF document text
    • http://rolubumemetujin.atwebpages.com/variateur_de_vitesse_altivar_312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54a19ac-a7ab-4dbb-b3a2-1770c049041e/28052618987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe14bbfc-779b-42af-b570-b341e1e584a1/14076961986.pdfIn PDF document text
    • http://vekisofekibote.myartsonline.com/79781584642.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_off0000ea25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 5152 bytes
SHA-256: 50e22c2ef6c500e88b1b0d2159fefb0e352c2fbd1f4c9a6c506f24590fa50930
font_01_sfnt_off0000fb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9F 10944 bytes
SHA-256: 2bf7387b82880102f7d4b80ae28c76e3cd1bcdeed7c00fd6742f320f7e4bb29e

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