Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c632180c3d2d57…

MALICIOUS

PDF

81.1 KB Created: 2021-01-21 16:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ab2cae47c84fa1941ad55e6c055875db SHA-1: b1b91c7e301b934477996514dd0ba819e8df30fe SHA-256: 10c632180c3d2d57fdc079cab59d646f6ace5e69e06f17b83c2bb1ca8a96c32e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://traffset.ru/123?utm_term=...', suggests a phishing or scam attempt disguised as a survey. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://traffset.ru/123?utm_term=which+of+the+following+is+the+least+important+factor+of+a+personal+fitness+program%253F PDF link annotation
    • https://xefolulewonud.weebly.com/uploads/1/3/1/4/131406676/mizijotaxufarub_livit_jivixoxibinofap_falowobikifad.pdfIn PDF document text
    • https://site-1180295.mozfiles.com/files/1180295/download_fonts_for_word_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455672/normal_5fad2a3bd7b49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f8b2c4cd82ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445114/normal_5fedb192ab19b.pdfIn PDF document text
    • https://site-1178803.mozfiles.com/files/1178803/xiwobexipisokasir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_5fbc3f3a0080a.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/wifesurolijusejul.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/ijhiicH/radio_italy_fm_music_and_news_sports.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/cr4gdig/11335891738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_5fea1dbebefdb.pdfIn PDF document text
    • https://site-1177862.mozfiles.com/files/1177862/annual_male_bicycle_race_in_france.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/iPMgjgp/world_of_darkness_mage_books.pdfIn PDF document text
    • https://cdn.sqhk.co/pugusomimoro/hG5BjjO/us_history_unit_2_lesson_13_quiz_review.pdfIn PDF document text
    • https://lakafoxure.weebly.com/uploads/1/3/4/2/134266374/fef66a15f10.pdfIn PDF document text
    • https://site-1172149.mozfiles.com/files/1172149/does_crossing_over_happen_in_prophase_2.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/miwolezedubujoz/30423366326.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/newspaper_background_powerpoint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/plague_inc_guide_parasite_brutal.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/96231593292.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/xoxozesezizije.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/corpus_christi_high_school_preston_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/berserk_1997_series.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/gapaxefowuduwojoreroli.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_off0000fdf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF8 5676 bytes
SHA-256: a4dec5f9d85000ddd5b3ec33b7b7bf6e194d3b4312e31c348fc4c6625678d840
font_01_sfnt_off0001113f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113F 10668 bytes
SHA-256: 5800a95cbf73fa47b54e45f1a184edef849051848b32d804fad144ecaba70c7d

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