Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2c45b159b95631…

MALICIOUS

PDF

72.1 KB Created: 2021-04-01 03:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 27304657fd41e771917a1cb2ef505fd6 SHA-1: cc09dc5133aaa9679a9ae1594360c3d466f340b8 SHA-256: 2d2c45b159b95631e5b66bc3434423e4204ee6b0ec460bf25c6afb0761a58140
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 0.9996

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 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://zajinet.ru/123?utm_term=sea+animal+flashcards+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499002/normal_5fe0b42c54c08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462678/normal_60082a3f6ad12.pdfIn PDF document text
    • https://rifodajawu.weebly.com/uploads/1/3/0/7/130739776/feb34d38f075fe.pdfIn PDF document text
    • https://pirusamu.weebly.com/uploads/1/3/1/3/131383726/mibepeka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_6044f403e7b6e.pdfIn PDF document text
    • https://geripefuni.weebly.com/uploads/1/3/2/7/132740274/903e9a18211393.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5fc8b3ca917a6.pdfIn PDF document text
    • https://verigidiloje.weebly.com/uploads/1/3/0/8/130874422/b647a63.pdfIn PDF document text
    • http://binixoloxagaj.iblogger.org/letter_of_intent_for_job_position_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://taraxibelojexa.rf.gd/2612442323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/919aaebc-3b22-4184-99f9-33961b88b434/what_does_the_word_howl_mean_in_english.pdfIn PDF document text
    • https://d6bf9bfb-c092-4b17-ab9f-91da83e6a9d2.filesusr.com/ugd/d7ad14_08947ec445494d8798fdea0606a505be.pdf?index=trueIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_c67d36189bcc42cba53cca45cd8bcf75.pdf?index=trueIn PDF document text
    • http://rosukijabadizi.epizy.com/tenik.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/97667368266.pdfIn PDF document text
    • http://gafomawonerif.rf.gd/remizomixiferugejutuvele.pdfIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_70612ca73e1b4964bef05527f86ebf21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/25099191095.pdfIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_c1869139943343f1b648b4c345955ed1.pdf?index=trueIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_3f952a21b1da4e2c8af28bbc4a249e37.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5818362-23cf-4a10-962d-7fbc9cbe633d/audio_technica_lp60x_fully_automatic_turntable_black_review.pdfIn PDF document text
    • http://vozuxekeve.rf.gd/99542979320.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_off0000dd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD34 5364 bytes
SHA-256: 2acb06dfaadf4b83814823f4964a0f9c921d77258c2b0fdc4799d347b0db4c96
font_01_sfnt_off0000ef46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF46 10560 bytes
SHA-256: 725b3aae1e85f95445229124c5b1fdc423aef31d631d53fdd24c9371cbe3e865

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