Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe6808c657fd371…

MALICIOUS

PDF

101.6 KB Created: 2021-07-21 11:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61f9d7c38c3c8d9b5a8e843e33dd8c8c SHA-1: f3ec01f3a926f0b28dbf1babf1f8609d7a2dc511 SHA-256: 7fe6808c657fd37153275928516343d51bcbed4e3d1143fd1f4949356f085975
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL, while appearing benign, is likely part of a lure to direct the user to a malicious site. No scripts were extracted from this sample, but the presence of embedded URLs and the overall detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8043

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/cEZ-xJcQpFE/square?utm_term=foundation+plan+for+residential+building
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f321bd26c2747482dd267c/1626546621577/raxika.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7c703a853d606aebb7df/1626111089043/if_the_world_was_ending_lyrics_jp_saxe.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0a4b8356fcf51b3e944a4/1626383544847/vosovetefukelipilexa.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7828b397fa11ba24ba725/1625784971086/after_period_when_did_ovulation_start.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90297db8bb141bad830f7/1625883288083/bsc_nursing_4_year_question_paper.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_off00012926.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12926 16792 bytes
font_01_sfnt_off0001413d.bin
5fafe22e618955f99061e942319fc97bdacb7c8ed5dfdf9efc6988bab313bb1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1413D 10892 bytes
font_02_sfnt_off00015a1a.bin
707619f31ec016ee9e6211d296d331d7fcc17835dcc1041a7c39667af7ffe609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A1A 17880 bytes

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