Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2e9584ee3a88ad…

MALICIOUS

PDF

87.6 KB Created: 2021-01-05 22:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8a7afa8a4ee3ef200258a3ff61b45bb8 SHA-1: e19ab1eb474f4cec1e7c485562e708bd0cd39221 SHA-256: 9e2e9584ee3a88ad7f4e25de450280464c81e008f916c523fb772a1e3fb67d14
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a significant heuristic firing for a 'PDF_SEO_LINK_FARM', suggesting an attempt to drive traffic to various sites. One of the primary external URLs, 'https://traffine.ru/aws?utm_term=alum+creek+fishing+report+2017', is presented in the document body, likely as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/aws?utm_term=alum+creek+fishing+report+2017 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402507/normal_5f90ea2436c1e.pdfIn PDF document text
    • https://faremuxonebaw.weebly.com/uploads/1/3/4/5/134598019/fuwog_lojukezuju_madebepuf.pdfIn PDF document text
    • https://xoselupovogim.weebly.com/uploads/1/3/4/6/134610719/mofokuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/598bbb8b-47b9-42a7-a76b-6b228a91a7e6/black_hearts_emoji_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcb4cba4-e37c-468e-9ef6-de4a03d60b45/facturacion_gasolina_grupo_fuchela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc581329-518a-43c0-9f77-84c611e08d8a/wipinewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e2d5fd-030a-46ce-af02-6ec1fddceb16/kindergarten_sight_word_list_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/adverbs_vs_adjectives_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/954e46c9-50a6-493e-be76-78e5532e4261/48528222747.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/dediwodeguvotasarejoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e39976-6c4e-42d1-9b4a-f39709019e34/dorf_svoboda_9th_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c6bb55c-9534-492a-881d-e702a3a368cd/personal_hygiene_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f005efe-0e7b-474c-b412-1c48a607d29a/98131489885.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001009a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009A 5680 bytes
SHA-256: 12603fb8ea59c1c25c98f93128fe83e58f905f04927dddd07deefc38dc0ac4ca
font_01_sfnt_off000113e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E3 11852 bytes
SHA-256: af10d275e8d07f79a33bbd731e42fd92fc2c2a3e5ceb468f755d5ca47acef09d
font_02_sfnt_off00013cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAD 16116 bytes
SHA-256: 3dae81b76154e7c62b3b0d30507344c78f02ee9172d09a03fe7a9af96af9e849

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