Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87a915b7d35f373…

MALICIOUS

PDF

104.4 KB Created: 2021-07-24 00:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1faf1bdfb74569d7496fa32984aad7ff SHA-1: f21797107b647685eb7636061e958064d06de4d9 SHA-256: a87a915b7d35f3734740ee778b2e5f580f8a464e4a980f5b213732354f89c977
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. The presence of a visual download button further supports the lure-based attack pattern.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/square?utm_term=what+is+a+noun+worksheet+2nd+grade
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e94ac537cb904475613d14/1625901765178/dnd_unearthed_arcana.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f6ea7afe74131a4c4e395a/1626794619618/1_serving_of_oatmeal.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f32c87ac7784023569a057/1626549384073/naxawegub.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f2173022c2eb207210af6a/1626478384612/5679175897.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f9bea8ce493555aeb0856a/1626980008768/peter_tosh_mp3.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec86365978cb5ccaab1399/1626113590229/notusumixoxoba.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60fb2ddb155adf42e015754a/1627074011209/77298235216.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f950c3bfcf5919e95e36f7/1626951875762/21457697701.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f3940ae13ee976660b2b9a/1626575882733/digimon_story_cyber_sleuth_complete_edition_all_digimon_list.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60faac712196492cf65dbb4d/1627040881818/how_do_i_find_my_bluebeam_product_key.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60fb2deba8a5df107550cd27/1627074027195/how_do_you_send_stickers_on_snapchat.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f10743b3a282695d31b5e5/1626408772304/for_a_thousand_summers_i_will_wait_for_you.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f6550166e8821a32c40d26/1626756353717/poxujovojomeb.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f39819952f835132d88c36/1626576921726/33483750280.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f9435a21f9913a1cf64666/1626948443639/jidajofer.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f72623edac3a249de1f2c7/1626809891342/normal_hgb_a1c_levels.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60fb2dd5072ea7269135a515/1627074006108/ejercicios_verbos_regulares_e_irregulares_6_primaria.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f832decf6047450f73bb3a/1626878686743/348936239.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133E6 16792 bytes
font_01_sfnt_off00014bf8.bin
f082ec4002c56a0fd748766e684acea81e8d481d7212479be65e79656356e04a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF8 17692 bytes
font_02_sfnt_off00017a6b.bin
9330fa1c8d4fa961f6c346e192186e8bb7e513df0ae6bc8723c596c430d6318c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17A6B 10872 bytes

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