Malicious PDF — malware analysis report

Static analysis result for SHA-256 260c3e52d78b9f27…

MALICIOUS

PDF

61.6 KB Created: 2020-12-06 23:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a2eff37f3e8ebf0d8e71948724d01845 SHA-1: d9a5d55159fa166c80bdfb34fa2ac62fd1f03125 SHA-256: 260c3e52d78b9f272d3e7f22a9947616515f9c9e721596ca2954f944be05d0a2
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://trafffe.ru/123?utm_term=manzanita+tree+centerpieces+sale PDF link annotation
    • https://nasabera.weebly.com/uploads/1/3/4/4/134447265/bedaruzuxokesog-desugape-losazoz-meletofan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392666/normal_5f9b44ee5ecd1.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/8d00a2d9-8ccd-43ee-895b-95a1d0177e91/lakorukix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4211d1ba-9602-463c-846f-3839c639c48b/jutebafi.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/excuse_letter_format_and_example.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/87811685121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/985989a9-0e87-4923-ab2a-0e631ba4b4bd/jurisprudence_exam_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/brothers_anthem_akshay_kumar_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/vintage_oil_lamps_made_in_hong_kong.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa9de5d-7114-4007-8e98-327d9b74b17f/76626594438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d2b8b9e-60f4-4280-b15d-21f1657a1040/cnet_best_projectors.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/fci_admit_card_link.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50a63c89e1c4b8fd938af/t/5fccc5a3eb18547f4b822c01/1607255460605/learn_to_speak_english_10_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/mnemonica_stack_download.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3FA 4980 bytes
SHA-256: 689c3ae73955e22e3bc896ef3ab11d3cb04c905760aa4f07ebc4cfb63d4e24b1
font_01_sfnt_off0000c50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC50C 10756 bytes
SHA-256: eef94fccd882c1646541626e6a94b3221ab86ae0fb086d11ee60ff10103d3d00

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