Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9ce06e314221c5…

MALICIOUS

PDF

76.5 KB Created: 2021-02-14 15:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 7ac10e31c1b4012249a6380a2e295efa SHA-1: 40bd0c577de84fef846bcfeebdd5c02b19b1f80c SHA-256: fd9ce06e314221c53a199194bcbb0573550d7de572dbfa536213e03247c1608c
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=sargent+school+north+andover+ma PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405179/normal_600db3456bee9.pdfIn PDF document text
    • https://niwuxepajo.weebly.com/uploads/1/3/4/6/134669398/piremereporer_basipebik_disoridovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403674/normal_6023c9e1367d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425504/normal_6015d498ca8e8.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jikebejilogotum.rf.gd/taiwan_visa_application_form_for_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/digukuwonomezefekakos.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/54021435992.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/11447871112.pdfIn PDF document text
    • http://jojemoditupu.rf.gd/80401134363.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/patisidiritomoniw.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/chitra_film_video.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000de6c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDE6C 12580 bytes
SHA-256: 837b0d7c01acbf9f8baa91766be68b595e4cb742c986a5aa4fb27a6a0980a909
font_00_sfnt_off0000cbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD9 5516 bytes
SHA-256: 1c08ebd0b57bee6456acf941d7a776bd346e73a4289a4691f0bed94d488284fb
font_02_sfnt_off000101cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CB 10232 bytes
SHA-256: edeaeaa5c97f5c09552230c4ace602624785f047d77df1de310276e17369b009

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