Malicious PDF — malware analysis report

Static analysis result for SHA-256 6628a52daf786dc8…

MALICIOUS

PDF

77.5 KB Created: 2021-07-18 15:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 93fec3978a110c79fbf6ad6608969de8 SHA-1: edaf0e1dcf4deee4a9ffbe21b7e7d12a271aea24 SHA-256: 6628a52daf786dc8fabe5354e8ce1480cc27c3042a9dba7aa422cbce6803df1e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that likely leads to a malicious site, suggesting a phishing attempt. While no scripts were directly extracted, the nature of the detection and the embedded URL point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/razvivatel/yapz/~3/v-xubMviL4Y/square?utm_term=four+principles+of+interpersonal+communication
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8497dbf61d063766b785d/1625835901201/paige_in_dance_moms.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee07656d720f75fb64d2cb/1626212197670/gunutazaw.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e903eccc7c08645925ba4c/1625883628631/9278523007.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee63b8115d504d3a88cbd8/1626235832289/neon_protons_electrons_neutrons.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f03084bf9aec2111b17bd3/1626353796850/sazeniwowufetuwakinezux.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e906ea566ded7d61abbec1/1625884394866/the_definition_of_complement.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee0fc23753dc428c84e267/1626214338283/pazejelixeride.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e957cb8915684aa53ed9d2/1625905099822/78056992014.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f3df14cba7b71501ebc7d2/1626595092788/keely_shaye_weight_loss.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f16bc974384d54fd0076d2/1626434506262/the_day_after_tomorrow_full_movie_putlockers.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3942e783e880aac833b74/1626575918973/what_does_vagrancy_mean.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_off0000d285.bin
289f4e3c6b4a78f310a03710db9d3e8f89be32caf069d34c3d553c2d808644be
pdf-font-stream PDF embedded font (sfnt) at offset 0xD285 10716 bytes
font_01_sfnt_off0000eb1d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1D 16792 bytes
font_02_sfnt_off0001032f.bin
292f1a571b325b1317b4b8fc9dc7b91e1692a9d69f3948a4fc52e20bde6115be
pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 15108 bytes