Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a24e972b11f9212…

MALICIOUS

PDF

78.5 KB Created: 2021-01-02 13:21:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4924637e864d9990ccdf58ad6a801154 SHA-1: c1fccc49dd035e1644d976f7dd71976abbfd3c4c SHA-256: 4a24e972b11f92120720862b4cdde5f030313f2c9f45026e11a933d0ffb01b3e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to Android developer options. The presence of an external URI and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/aws?utm_term=developer+options+pixel+3+android+10 PDF link annotation
    • https://cdn.sqhk.co/godajaxox/GSigTU4/36636165094.pdfIn PDF document text
    • https://cdn.sqhk.co/zavufepugife/h9kjhgd/xapagugevosovalezazarok.pdfIn PDF document text
    • https://cdn.sqhk.co/baxemazisod/jezVkjf/hockey_multi_tool.pdfIn PDF document text
    • https://cdn.sqhk.co/pasovevutuvi/hbpigjj/cable_selection_guide.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/lovetijif/watudedomoguvebomejes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/181a757c-ce32-44f7-a915-947f1004f98f/pirafekulerapuxezususowud.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/39331933682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d40647-9d81-456f-9561-47fe89444168/chef_bio_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b39a7bf-222b-45f8-bd01-929eb65c5517/76508376019.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/56819913786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c54f69-5145-43bb-b61f-460e85e8307e/39828157773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c7d50b4-62c0-4832-920e-7f650155e59f/nezusesovuvopuxawuwivufu.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/metformin_dose_in_diabetic_rats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec28d6c-6ddf-4ea1-aea6-56268ad157b6/fury_movie_online_free.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_off0000f5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A9 5436 bytes
SHA-256: ddbc212e6c3559c167763d0b4ba9fb3521e65bbaa9481d57b0e660bc721a4949
font_01_sfnt_off00010844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10844 10700 bytes
SHA-256: b89a5b7df27fde80f8c38ef90429c4638797681363eb02f0de5d51c6ea214aa2

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