Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a563bfca2bf8c1…

MALICIOUS

PDF

84.6 KB Created: 2021-03-20 03:37:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 04ae687d36b1117eea81a4ec2e838fee SHA-1: 5a5f772980fae7d5234e966cc83cb1ccfa87a82b SHA-256: 53a563bfca2bf8c19d3ec3a357f5657c83e1b545e43eff3f760544eed0f93e41
244 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a link to known malicious redirector infrastructure and a large link farm. The embedded URLs suggest an attempt to direct users to potentially harmful content or phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or SEO manipulation campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=kagerou+imaizumi+wallpaper In PDF document text
    • https://balabirow.weebly.com/uploads/1/3/4/6/134690292/a4711.pdfIn PDF document text
    • http://copyright-helps-team.com/what_is_software_life_cycle6xxuc.pdfIn PDF document text
    • https://gawozigojuvapa.weebly.com/uploads/1/3/4/8/134896601/a3864.pdfIn PDF document text
    • http://wewudiwiwojob.22web.org/bandook_chalegi_dj_gana.pdfIn PDF document text
    • http://islemleriniz.org/asa_prepware_activation_codes1qaf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450042/normal_604637c6e7416.pdfIn PDF document text
    • http://yesitalia.fun/muzakininofapiwelazek406b.pdfIn PDF document text
    • http://sereluxulu.iblogger.org/analgesics_in_pediatric_dentistry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416669/normal_603639adc72e4.pdfIn PDF document text
    • http://honey-love.ru/does_procreate_create_vector_imagesn0jg6.pdfIn PDF document text
    • https://golakabuzoved.weebly.com/uploads/1/3/4/8/134870140/8254355.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magoravir.epizy.com/samopodagibut.pdfIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_90768944c9264591b8f57edec7e35e41.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2433a073-77d9-45f1-aa4c-194d531c1db9/29324106041.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_20c31ce5c1e24e0c9f2a503a3037c743.pdf?index=trueIn PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_1b5bd37b39b44094b6d5cfcc0733bb22.pdf?index=trueIn PDF document text
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_659d76f69db34b4c81900c89e82c3ad8.pdf?index=trueIn PDF document text
    • http://vofofoduwegakuv.rf.gd/22284930822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5498c9f-1d9d-4929-8b94-87a563b6438c/mamipidutilerukimegoto.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF596 5072 bytes
SHA-256: 301c559a9bcc53fc3eb1c644fb850e02b09470dbdf46175792dee7f025fcc4a9
font_01_sfnt_off000106e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E4 11584 bytes
SHA-256: ebaa68365f41fa05b07527e3863a77e1fedd337d228892c503b982f927ba5a2c
font_02_sfnt_off00012e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9D 16084 bytes
SHA-256: 62a91fb32920f6e8cc04f0b1e834142448e73e4a31e16512d2a7fd751ba0d286