Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6e7aab03048b9ce…

MALICIOUS

PDF

178.4 KB Created: 2021-03-21 23:13:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af0de71c845bc16c4638829e1ad0d9e1 SHA-1: 9612ba0fde6291d62111c4f5f6b2a195dc2d7c48 SHA-256: f6e7aab03048b9ce2a50323760a61fb2c4f21085531f48ebbba5afd1a9a32bc5
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that appears to be a phishing lure for "avg pc tuneup 2020". The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site, likely for software-related scams or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://leonvi.ru/wix?keyword=avg+pc+tuneup+2020
    • https://wopokajam.weebly.com/uploads/1/3/0/8/130874492/xunimedivir-muluzegu-juwopilida.pdf
    • http://limons.space/volume_of_a_cone_worksheet_grade_8k4hvk.pdf
    • http://gotosutafizal.iblogger.org/ruxaj.pdf
    • http://loseriwudovo.22web.org/acurite_thermometer_manual_00592tx.pdf
    • https://cdn.sqhk.co/dolafita/ebhfTTl/sausage_dog_table_runner.pdf
    • https://cdn.sqhk.co/fazovivum/haiaVgd/angry_crusher_birds_apk.pdf
    • http://wtia.space/dejetibatamutalz5q0x.pdf
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/figiwijipubu.pdf
    • http://okclub.org/150764366421l4mc.pdf
    • http://ellmax-site.xyz/2001_mercury_25_hp_4_stroke_specsgs98p.pdf
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/legavozo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_e464a0ac70b4444d9edc6f4baa9f09dc.pdf?index=true
    • http://jedolup.rf.gd/yamaha_sound_reinforcement_handbook_ebook.pdf
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_f4ec8cc9070546d6bfaa874da137b941.pdf?index=true
    • https://3e206333-d6ff-4be5-a246-6289f7259d3b.filesusr.com/ugd/973a7d_fd397d9f8c414ee4ad0b6db163327c7f.pdf?index=true
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_d9cf21d7ac764ecdb8d370e9547d04db.pdf?index=true
    • https://s3.amazonaws.com/kikunojulejuj/dojavazepevokudin.pdf
    • http://rejekokamikax.rf.gd/42869779920.pdf
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_619e5e484ffb4f28904efb5d28b2759d.pdf?index=true
    • https://s3.amazonaws.com/bexolamabad/bahubali_2_songs_starmusiq_tamil.pdf
    • https://s3.amazonaws.com/zuguvoxoki/what_is_affrication_phonological_processes.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e4.bin
81d6290f703999be0520408966c74deb78c964329844e127606ee70d4f731977		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 137444 bytes
font_01_sfnt_off000285ee.bin
5e15166f7c91a7c35b3d8684b2fb1998b7ff1c7f72599d198b88502b53e4e472		 pdf-font-stream PDF embedded font (sfnt) at offset 0x285EE 4908 bytes
font_02_sfnt_off000296d9.bin
640155775fe4316213ba8755ebbed547e42f81ec9f1c3a5676f543901b30871e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x296D9 10248 bytes

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