Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10569fcc1946ed3…

MALICIOUS

PDF

67.4 KB Created: 2020-11-10 10:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f2fc82acc04f0994043a51ed3b2f90b SHA-1: d64b8592e00a47249a3f7f59abebc7dc97b2fdfa SHA-256: f10569fcc1946ed31581e925016cc4e51c47e8713b100e09c2604f5c64e22de4
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate the presence of an external URI and a ML classifier flagged it as malicious. ClamAV also detected it as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to 'foil method worksheets printable'. No scripts were extracted, but the presence of the malicious URL is a strong indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?keyword=foil+method+worksheets+printable
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5fa34af08a112.pdf
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5fa3992ea5d1e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1d0d1f71-65eb-44e3-9106-2d0832d4eb39/dufelafigukumaladutoleri.pdf
    • https://uploads.strikinglycdn.com/files/ea519a0b-942e-40d9-9664-ed2bcb716af3/yahoo_answers_girls.pdf
    • https://uploads.strikinglycdn.com/files/46d6b86e-f522-4a70-84ce-de6f474d21ee/buzikapugaguxerowezufu.pdf
    • https://uploads.strikinglycdn.com/files/a34eaef5-c052-4dd9-90ee-72d09359fbe7/puwepomepiza.pdf
    • https://uploads.strikinglycdn.com/files/982334bc-c3ff-43df-bc80-deb65b90a609/wudekifegutixuzafoviwoma.pdf
    • https://s3.amazonaws.com/jamuluvuvava/diwukebig.pdf
    • https://s3.amazonaws.com/tuxenipup/sara_bareilles_love_song_piano.pdf
    • https://uploads.strikinglycdn.com/files/f3899a35-7948-4cef-9369-708b488af739/vidofakilufoligetenovogek.pdf
    • https://uploads.strikinglycdn.com/files/0e301f92-2245-4a8b-b902-fc5210fc976d/lenovo_80xs0024us_review.pdf
    • https://s3.amazonaws.com/guxosa/hashihime_of_the_old_book_town_ost.pdf
    • https://uploads.strikinglycdn.com/files/27f22787-dbff-412f-ac9f-1281550506a3/15809220533.pdf
    • https://uploads.strikinglycdn.com/files/3dffb2df-1417-4459-91bf-886afd486fa2/vezudujatenilifun.pdf
    • https://uploads.strikinglycdn.com/files/b5b92d72-fcc7-4d86-ba1c-ccbd794bdc84/ge_predix_architecture.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_off0000cb5b.bin
c20cd691168d93578a87b911080c451ebb68599c233586c278be9b1911e43a3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5B 5448 bytes
font_01_sfnt_off0000ddbf.bin
de394fdb03586cd4f3055e6abdf8385ce59f3f1ddfd0d12c6a6ff3a81e53c760
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBF 10340 bytes