Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d22b444eb171664…

MALICIOUS

PDF

80.0 KB Created: 2020-11-19 21:11:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0efb7d877a8bf546cb481787dba57799 SHA-1: e40e58514017f0a3c312d50bcdf14a8d9fadbbb5 SHA-256: 6d22b444eb171664f8f63c1953e3a9478b98c93e7c38fdc0dcc34117884358a7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The primary URL, 'https://traffking.ru/123?utm_term=1300+math+formulas+by+alex+svirin', suggests a lure to disguise the malicious intent. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate a potential for hosting or redirecting to malicious content, aligning with phishing or SEO manipulation tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/123?utm_term=1300+math+formulas+by+alex+svirin PDF link annotation
    • https://beluxavin.weebly.com/uploads/1/3/4/5/134507718/7820f3796ee89.pdfIn PDF document text
    • https://josafobuwevaj.weebly.com/uploads/1/3/4/4/134464642/5547885.pdfIn PDF document text
    • https://wukemurorafol.weebly.com/uploads/1/3/4/3/134338373/jepuvusegikitazani.pdfIn PDF document text
    • https://davugunibelerab.weebly.com/uploads/1/3/4/6/134612729/959ef5e423.pdfIn PDF document text
    • https://lozagazol.weebly.com/uploads/1/3/4/2/134266804/vofozex.pdfIn PDF document text
    • https://xuzajozobesafod.weebly.com/uploads/1/3/4/7/134718295/gowesamazifiwop_wawato_fizubomes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/memexelu/job_recommendation_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/71701502648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af55e0f4-50d7-43ad-8101-96f64bc9181e/lsat_study_guide_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/actual_reading_ielts_test.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/tesla_model_s_cost_of_ownership.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/tomugunutoxusapekowojam.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/spanning_tree_protocol_commands.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/39226887157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/556b3d03-f7ce-43e8-8296-893a0b0fe3d0/petisuxatasu.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88C 3032 bytes
SHA-256: 885afa9fb1f5582618ccf3788242b317108d8fc1380332a0568e0be2506aeafc
font_01_sfnt_off0000d35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35D 5524 bytes
SHA-256: d3b8c3869f7fc0753bedff40f149842f7a53c2a3f9fbb32b1d4038ff3ef3c003
font_02_sfnt_off0000e601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE601 2664 bytes
SHA-256: 268d7decba4c73126bb05f4bb077c839daa1aa078ff9916b72f9cba748061c1a
font_03_sfnt_off0000f17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17C 15680 bytes
SHA-256: dcc8b13ad26ed7306e1076371e93ca7a90ce0d97211ec4a6a7e94478934e7461
font_04_sfnt_off00012215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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