Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3d7e214b9a73b3…

MALICIOUS

PDF

70.3 KB Created: 2020-11-11 06:20:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d19e5dbc78676c3a88f549e454ba0086 SHA-1: d25202a41d7b0c81fac56b535ad372042b4189f9 SHA-256: da3d7e214b9a73b3d28449eac2d24792d923c03ca6aa583acb633b0089b2ba74
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 0.9997

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://trafffe.ru/aws?keyword=camp+turrell+boy+scouts PDF link annotation
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/lesavafafebo_xonozaxalifusik.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/xukidosifixi/63671311847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b21733c4-411b-4e65-9dcf-fa0f4356d899/13490099330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a42b96b-3d44-4e93-90e6-d33eaba4c5dc/star_stable_star_coins_hack_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc8293fe-cd66-4b0d-9e9f-af1d51430f44/22860172753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4542e00e-103d-4657-836c-146671ec687b/mefokilemipozip.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/naruto_vs_bleach_unblocked_76.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/5249807602.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/37592971201.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/gubalisawudawifaroferajit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51896c49-defb-4451-ae3b-4534d93d62c6/29596578969.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/60228661909.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_off0000d60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60A 5228 bytes
SHA-256: 0db44f49cad37d58c13cd4cc7a79c93f2a4094178c748ef0728f84938bb8c48c
font_01_sfnt_off0000e7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BB 10904 bytes
SHA-256: 91d490010efae3468ef2a189418b523cd620ed9ddf13fd23d154fac88d074b1e

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