Malicious PDF — malware analysis report

Static analysis result for SHA-256 754d958d1f71b224…

MALICIOUS

PDF

76.7 KB Created: 2021-05-19 08:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 057bef80e1da7c305d1264a3159c22a3 SHA-1: 17c708c43fcfc93f4e0f07ec660d17e072807a57 SHA-256: 754d958d1f71b22438cc7a10d9c9ab37508b4f68a1b8b4573bf6122a27f8b478
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external links, many pointing to disposable hosting. One prominent URL, 'https://ponafet.ru/wb?keyword=tracfone%20samsung%20galaxy%20a10e%20smartphone', suggests a lure related to product searches, likely for SEO spam or phishing. No scripts were extracted, but the PDF structure itself is used to host and distribute these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://ponafet.ru/wb?keyword=tracfone%20samsung%20galaxy%20a10e%20smartphone PDF link annotation
    • https://rigawegafo.weebly.com/uploads/1/3/4/5/134587157/4998949.pdfIn PDF document text
    • https://zulezinema.weebly.com/uploads/1/3/0/7/130776370/9a47a1003c5.pdfIn PDF document text
    • https://betutinixe.weebly.com/uploads/1/3/4/4/134481053/2c038252f.pdfIn PDF document text
    • https://lebotuzipum.weebly.com/uploads/1/3/4/5/134519329/jemitabaketobotejopa.pdfIn PDF document text
    • https://sebupemisopuba.weebly.com/uploads/1/3/4/7/134706320/5ea1b8fe97.pdfIn PDF document text
    • https://konomotawet.weebly.com/uploads/1/3/1/3/131379362/zokili_keruvufita_kudafinikajexi.pdfIn PDF document text
    • https://bopewoxal.weebly.com/uploads/1/3/5/2/135296364/betudeziliviw.pdfIn PDF document text
    • https://kufaxaza.weebly.com/uploads/1/3/2/6/132680799/tetosegafetaw.pdfIn PDF document text
    • https://lekomuge.weebly.com/uploads/1/3/4/7/134773229/0aaa198.pdfIn PDF document text
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/bexas.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/zemigiduwagafu/77977235853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bcf26ff-0d75-4f3a-a3a6-af4546fca454/html_basic_tags_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afa4b993-e482-4cb8-98ff-f7171342f584/65133629499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00defebf-c673-491a-b686-40be59a317e8/dir-615_admin_password_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8239013-72d3-4d68-9766-174b7c8d944c/pabakaxobobugexubaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc22571-62ee-4324-af67-0547303ec4a4/59624408044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d517a71a-1393-4592-9ed7-82d7c5451c76/what_is_the_main_theme_of_dr_heideggers_experiment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76c906b-7909-46ec-b85c-71a61df10b64/gmat_test_prep_course_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/76966377179.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/77022879017.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/78536896190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/475cad55-4d55-4736-8b3a-dba134c9737d/how_many_died_from_spanish_flu_after_ww1.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_off0000eb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB36 5744 bytes
SHA-256: 84eb25363ba34e61cf1ed179f8b7a8bc6873ddd907afc646fad1d5c276af9aca
font_01_sfnt_off0000fea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA7 11456 bytes
SHA-256: 1fab0146f923f648b923c8840de7fe10b80488651096ec748b0e8c4970d53094