Malicious PDF — malware analysis report

Static analysis result for SHA-256 45bb4bcc99f50ab9…

MALICIOUS

PDF

73.5 KB Created: 2021-04-01 23:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de1c4c78814b61cfeb1e857af8fd5e9e SHA-1: d6357e271736171902fe976cb71cff048e208275 SHA-256: 45bb4bcc99f50ab91eea4d0d386cde78b9c2569de07d16ca38e8d085530178c9
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to refrigerator repair, directing the user to a malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit users through a phishing pretext, likely leading to a malicious download or redirect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/strik?utm_term=my+whirlpool+side+by+side+refrigerator+is+not+making+ice
    • http://comp-arenda.site/what_does_intercession_mean_in_the_bibleit84u.pdf
    • https://cdn-cms.f-static.net/uploads/4489988/normal_60374dddddbf3.pdf
    • https://cdn.sqhk.co/piwizogir/khcggig/37169069025.pdf
    • http://copyright-supporthelp.com/945152561616x4ay.pdf
    • https://cdn-cms.f-static.net/uploads/4484821/normal_60430b6d3a44c.pdf
    • https://cdn-cms.f-static.net/uploads/4446166/normal_605c3b11d4979.pdf
    • https://cdn-cms.f-static.net/uploads/4421983/normal_5fdc006e66ba9.pdf
    • https://cdn-cms.f-static.net/uploads/4446651/normal_60145f3bd5d54.pdf
    • https://static.s123-cdn-static.com/uploads/4505358/normal_5ff3c22ba42f1.pdf
    • https://cdn.sqhk.co/rogolafu/bBiANWu/26134549854.pdf
    • https://static.s123-cdn-static.com/uploads/4367950/normal_5fca56a68edaa.pdf
    • https://cdn-cms.f-static.net/uploads/4370737/normal_600ea4d84ade1.pdf
    • https://cdn.sqhk.co/kototokim/gVvHQhe/lyrical_lemonade_shirt_ebay.pdf
    • https://static.s123-cdn-static.com/uploads/4490244/normal_5fc6206cd44d8.pdf
    • http://matras-24.ru/blender_manual_2._78arof3.pdf
    • https://cdn-cms.f-static.net/uploads/4496404/normal_606220c478105.pdf
    • http://eroganoficial.site/android_x86_dual_boot_windows_10w0zvj.pdf
    • https://cdn-cms.f-static.net/uploads/4426688/normal_6024997b44cd2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fusidejebi/pokemon_glazed_randomizer.pdf
    • https://s3.amazonaws.com/rijaliwiguvex/most_used_design_patterns_in_android.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e037.bin
f77384e7227bbc3f3f1000bfab6cd441fa977ec497f38a43dde546f3f844f999
pdf-font-stream PDF embedded font (sfnt) at offset 0xE037 5972 bytes
font_01_sfnt_off0000f481.bin
8fb812fcd3ef172a9400acfca15fbbe481289afe0ae97458cb15d30d85d5c2f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 10688 bytes