Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33c8d48744e6177…

MALICIOUS

PDF

95.1 KB Created: 2021-03-21 22:55:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 310ddafd87f7a56cfaafe8c670ff5272 SHA-1: e17c8033a6c8a360a902a87b90535fddbf0dcd85 SHA-256: e33c8d48744e617765905b6e7e4eb152f991ef38b780122a50cd5311665b6ae4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9989

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/wix?keyword=alien+hominid+fun+unblocked PDF link annotation
    • http://ziwewixowele.sportsontheweb.net/64266797616.pdfIn PDF document text
    • http://leftoutclub.com/7130441160c31su.pdfIn PDF document text
    • http://ru-dev.xyz/xeroborezigewuwaw5m965.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/free_chemistry_form_2_notes.pdfIn PDF document text
    • http://mebets.xyz/47121648820jc19o.pdfIn PDF document text
    • http://everydays.space/60925536067eocei.pdfIn PDF document text
    • http://kungfumalibu.com/zowugonugiriwezs06bz.pdfIn PDF document text
    • http://redit.fun/statistical_learning_with_sparsity_bibtexdm2ip.pdfIn PDF document text
    • http://presente-top.store/lowrance_elite_5_user_manualpuqt1.pdfIn PDF document text
    • http://new-volosi.ru/60055112141q6zxg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_f8e04c624ea944c09de9bf5b2f9d36d2.pdf?index=trueIn PDF document text
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_7b1d551849e3447bbf5c742540be5956.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a39ae51-9202-41e3-bc8d-24ebb8fc6372/midenonakoxomivikixuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/rewawujumebefolorili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45acd99f-b097-4f2e-9b90-c4a817d25a31/23839609013.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/atwood_g6a-7_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7288520b-ca90-469e-87d4-b47a849b6cdd/jirugemubemojotajikun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f688bf8-55b7-4238-b58d-10db8cc0ccee/17836975568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d1dee0-3347-4534-b7e9-dae91b9a98fb/wogub.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_879d50978a5540d6bf6fd2c4f7c46129.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/memexelu/introduction_to_academic_writing_vk.pdfIn PDF document text
    • https://5a98ae10-8c7e-48da-b83f-9bcbc644cfa3.filesusr.com/ugd/9a8764_c03695185bd54aefacada61eb4918160.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wefadep/24579016224.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_off0001270d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270D 4320 bytes
SHA-256: 3954051e0e6156df01e799e1ba35e5bbc7dd4bfd054f396706699add46002f06
font_01_sfnt_off0001364e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364E 4972 bytes
SHA-256: fa228a71330dba438ea501c1038902a36c3ddf53ec506dff692d7ebe75fabfb9
font_02_sfnt_off00014718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14718 11744 bytes
SHA-256: 0d248a16b2597d6676e6485fb335924f3313837e557a791d405c93803f94018f

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