Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd3d5b81f9cc6f0…

MALICIOUS

PDF

77.4 KB Created: 2021-04-05 18:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 252f0022cb77e1de3ed17ddc6d46ee13 SHA-1: 73feea165b6317535687577ebe77cb87470c3155 SHA-256: ddd3d5b81f9cc6f016845076f05d42de028159f7b92e6d2d4a90bc2b1939ba45
156 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 0.9996

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://lozipotod.ru/123?utm_term=bang+bang+video+song++tinyjuke PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488101/normal_5fe226d47a5f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448332/normal_60523b3e2ca55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410206/normal_5fcbf8be583ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448538/normal_5fe4350317065.pdfIn PDF document text
    • http://edevletorg.com/all-clad_slow_cooker_with_ceramic_insert_4-qtssjet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489740/normal_60659ceb36250.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495855/normal_5fcf2b3e757cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_603b81379ee36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455207/normal_5ffc229730f3c.pdfIn PDF document text
    • http://clubstore.info/wheel_action_driverskeras.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402501/normal_5fee32ba0dd3d.pdfIn 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
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_d92c60cc501a48d0a4dd7c562f2b6abf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/49c05c41-8a69-4c0d-8fd1-a88355919894/35869421209.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/61262340492.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/pajubofejapumafiber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800ba142-2aa9-4c74-a643-43aa9ef3cf23/grigori_grabovoi_healing_number_codes.pdfIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_605a9069e73b4a459ebd530e4517d308.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd99687-126b-45d9-b36b-a4069592b0fd/pride_and_prejudice_quotes_elizabeth.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/excellence_riviera_cancun_room_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c38a90bc-1352-4b44-9889-b1e93a896d80/what_is_the_difference_between_soft_news_and_hard_news.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/pulse_connect_secure_upgrade_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AF 5240 bytes
SHA-256: e6ba5c7641e331e741e8fc848077b72f89686c083dd07b6807c50790e3973321
font_01_sfnt_off0000f4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A3 10932 bytes
SHA-256: 3975e64dbeb930869eb6721c20331c07b9eda0079ae9af0cbc50ee5eeed310a0
font_02_sfnt_off000119ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FF 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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