Malicious PDF — malware analysis report

Static analysis result for SHA-256 44666acc7887eba2…

MALICIOUS

PDF

80.2 KB Created: 2021-03-30 02:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7cbcdb3b551536ab99a06e3699152994 SHA-1: 5cff917815120340b82d76e773ee61e8027e102d SHA-256: 44666acc7887eba22f21302edfa12f7fb0d15e23f4ad16537e56c5d8ef9889fe
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/123?utm_term=cbse+net+july+2018+answer+key+geography PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449185/normal_605938fd519b7.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/hbxmzge/enchantments_for_horse_armor_in_minecraft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490752/normal_603c3a16e67e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426972/normal_5fefd45bb05b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380543/normal_605f47ec2f4c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479673/normal_606180f4c19d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492900/normal_601986ba39c51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_601770cc9943d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409110/normal_600a220775124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417645/normal_6017a421649ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415768/normal_603fba4162591.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373770/normal_5fed51616e9a2.pdfIn PDF document text
    • https://cdn.sqhk.co/nupopobax/iejdAan/can_knockdown_3_apk_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444123/normal_6033f77c644ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370319/normal_5fe117d819b5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477878/normal_5fe0115899cef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394062/normal_5fdea0acd6455.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/M8iiiaU/74518457144.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413986/normal_5fe18b491a373.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/40bec23c-614e-43f1-b07d-eae5026ed676/mitonijagikuruwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9f27ed7-6669-4adf-ba1c-25dabc1a4608/55750636410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a9e8af2-ce21-4fe9-b3a1-5348bcd673c2/sperm_wars_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401a5bc6-86fe-4daa-894e-51fa2d2078a6/54042511838.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE313 5980 bytes
SHA-256: 531b065b3a94a82445566521fb1105e2247069c1194f61e2ae070a10386d1dfa
font_01_sfnt_off0000f789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF789 10696 bytes
SHA-256: e0768df035195105cb269f5de9432ab76a89e38b813eb971efe017301f7352e1
font_02_sfnt_off00011c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2F 16096 bytes
SHA-256: 7abc053b067790dce98f5e0953789ba27cd492a81e299876af0b74551ca50db4

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