Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b4c4b9c1045db8…

MALICIOUS

PDF

93.6 KB Created: 2021-07-19 15:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 058e440559b01381e6dfdf4f4a5de7f8 SHA-1: f7fd462027332e707c627907ec92872935e4cdec SHA-256: 86b4c4b9c1045db8ecd3f514313d8bfeb2818ba3e0917a33e808994fbb1630db
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The PDF contains embedded URLs that likely lead to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://feedproxy.google.com/~r/sq/ugae/~3/jEScUJLm1bs/square?utm_term=word+and+object
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7a57557d2352c927955d0/1625793910140/rofusabiramuve.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7ceb77e45264421f83525/1625804471837/zazoli.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f07374faec3a5c4dab02f5/1626370932649/mid_year_review_answers.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f146c246c0d74f87dff7e2/1626425026259/98870512215.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eca2aa7b14134336df9265/1626120874596/moxepunojusijeronetu.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2e1539dfa584dc9d93b25/1626530131592/hind_waters_and_fore_waters.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f41a8d54c26a0cc3032bbe/1626610318859/13349805380.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f2df39699a8678c5753be2/1626529593477/dispatch_riders_in_egbeda.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f54504c2d40e67ec2149ce/1626686724277/english_pronunciation_in_use_free_download.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee6c84537273346e32a0e3/1626238084464/sajitinudaloxafiv.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_off00010f0f.bin
4fdbaa6001ab86f25ee9605fd0e35841a066e1b5078e03d4c7f9f3df680ab4b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0F 10320 bytes
font_01_sfnt_off00012670.bin
0b8484b51b73ff3d34be71a9308b843fe8ebbd9b92ba019320b5ec8ca9527461
pdf-font-stream PDF embedded font (sfnt) at offset 0x12670 16952 bytes
font_02_sfnt_off00015283.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15283 16792 bytes