Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabdcfda3f127fd6…

MALICIOUS

PDF

77.7 KB Created: 2021-07-12 20:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d114affe2901eb197e1d400d3669fa55 SHA-1: 0934f40bcf83f9ea4bf3da6df6b7e6ec13ac7845 SHA-256: dabdcfda3f127fd6f58bf1705409656031aac2892404060b605b9392fe74fc42
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that, while currently flagged as benign, is a common indicator of phishing or malware distribution schemes. The PDF structure itself is also noted as having duplicate objects, which can be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://feedproxy.google.com/~r/sq/ugae/~3/um1bUVUAM38/square?utm_term=i+want+to+see+you+in+spanish
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7f2a4687a3d659a4cfd59/1625813668276/yellow_fever_is_transmitted_by_which_mosquito.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec77f331b0b43e07e5a295/1626109939900/do_not_take_it_for_granted_meaning.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9474edc37083541b9f419/1625900878216/19462010425.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7d40dd0799e4214c037dc/1625805838058/61792888426.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e91f72f107ff2467e903e0/1625890675224/gulzar_poetry_on_smile.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7d33580504e0a7768f6dc/1625805622207/plate_tectonics_test_study_guide_answers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e92832e51f1f218d6a4438/1625892914690/talk_meaning_in_english.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e86da6939f1c477727397b/1625845158156/pamepixutijajobewapeso.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7aa3288cf71862a8a7d1/1626110628097/stye_differential_diagnosis.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_off0000cd75.bin
2e92a5f8c3d35cd7df6cd1ea591a5b9f37bd73d8d040491b0b7b329d4f3dc9eb
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD75 10452 bytes
font_01_sfnt_off0000e53e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 16792 bytes
font_02_sfnt_off0000fd50.bin
22f6df8f9b1c0203be6cb7c096d1684ba351cf51a9264ca06d3f0d7d03915c7a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD50 17376 bytes