Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b5ccfbd80ed7776…

MALICIOUS

PDF

68.7 KB Created: 2021-02-26 16:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b4cc88ec7a4d98e366df122e31f805f8 SHA-1: 971730fcca483a65ff9856e3dc38a8a789554aca SHA-256: 5b5ccfbd80ed77761ac50a11949bbb62b89e4fb8b96dc3316b8e987240dd89d2
156 Risk Score

Malware Insights

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

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 0.9998

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 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://xezojetit.ru/strik?utm_term=bloodborne+collector%2527s+edition+strategy+guide PDF link annotation
    • http://gejesixave.scienceontheweb.net/fojizogosigomigujefux.pdfIn PDF document text
    • https://laximazerafa.weebly.com/uploads/1/3/4/2/134235816/babagome_jafefaxalofu_vasisasim.pdfIn PDF document text
    • https://zuzowasef.weebly.com/uploads/1/3/4/3/134351381/5448652.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/kiss_the_rain_yiruma_lyrics.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/bitajemisajoz/gorasarovenaruvavafijizak.pdfIn PDF document text
    • http://fojakosi.atwebpages.com/hp_officejet_2620_printer.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/axel_springer_se_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/zinefiworokax.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/blogger_instagram_lightroom_presets_free.pdfIn PDF document text
    • http://tojozolatenizum.epizy.com/georgetown_data_science_certificate_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/pozezeruwanolitapu.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/types_of_multilingualism.pdfIn PDF document text
    • http://tenurusimuxu.epizy.com/52248735055.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/52563949848.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/foxaguvikupa.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_off0000c2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DE 5312 bytes
SHA-256: 842f3262e3a842b4e14e4f2d0a901f2897d2797e9a7becddc800f25bccd97566
font_01_sfnt_off0000d501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD501 10148 bytes
SHA-256: b3f3b726d92152e0c89622ac82da76d225cdda660ee7bdd53b9836b93be09ffa
font_02_sfnt_off0000f7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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