Malicious PDF — malware analysis report

Static analysis result for SHA-256 116adc4300c71acd…

MALICIOUS

PDF

80.2 KB Created: 2021-03-29 17:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0c39acbddb1cd329eb0fbe05d8f57eed SHA-1: 8ee6dcf1e834b9996c0d5fd86b81f75031905dd8 SHA-256: 116adc4300c71acda808b6aaabd649d5b57202ed727d6b851e65cb92ae35b5c4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains an embedded URL that leads to a suspicious domain, likely a phishing lure. No scripts were extracted, but the presence of an external URI and the overall detection profile suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=how+do+you+write+a+short+story+in+one+day PDF link annotation
    • http://gezetola.scienceontheweb.net/solar_system_download.pdfIn PDF document text
    • http://wavapivanuf.scienceontheweb.net/nafefidegab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501495/normal_5fc78b7fb1d85.pdfIn PDF document text
    • http://mogimetekojubar.scienceontheweb.net/canopen_protocol_tutorial.pdfIn PDF document text
    • http://micrometer25bill.site/damifiwewesikofagateronegmcaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370303/normal_5ff64ba2c2e0e.pdfIn PDF document text
    • http://akmurzina.com/kujamileragabeschis7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415327/normal_5fccd051417eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459328/normal_5feb40c10f618.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://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_8955034e55304ebba861897fa5be0623.pdf?index=trueIn PDF document text
    • http://wepikupovug.myartsonline.com/chemistry_a_molecular_approach_nivaldo_j._tro.pdfIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_d33efa3a6afd4e3dac43be148ee471b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wemazun/twitter_for_windows_10.pdfIn PDF document text
    • https://70a023e4-b173-4b34-8ac5-854d526a16b0.filesusr.com/ugd/5aec30_eac65e62b8f74aa39aef5969aa36c8d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bojafazes/naruto_shippuden_ninja_destiny_2_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/online_android_emulator_with_play_store.pdfIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_9a67b50e95c1451ab03f366b535ed3ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/where_are_hot_springs_hot_tubs_made.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_off0000f0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C4 4920 bytes
SHA-256: a90480907721965fd11f755bd8acb9416f8e32e4ba7e72618939d717d2de021f
font_01_sfnt_off00010184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10184 10600 bytes
SHA-256: ff38f17ef8a07700b6b5581b0471132b975dbaa0e7ce0d7f66fdea7e4e6d67e9
font_02_sfnt_off00012598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12598 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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