Malicious PDF — malware analysis report

Static analysis result for SHA-256 15bb400cea36a881…

MALICIOUS

PDF

74.5 KB Created: 2021-02-23 12:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b7f7e10f66f1d4c83d18f2d990eeb686 SHA-1: 73d8cf7017bb4066d928d3d142a4ae2f2635eb12 SHA-256: 15bb400cea36a8819bd349c86a0db7c69992727abd22a8df6d77ab7a13252771
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An external URI, https://jottigo.ru/strik?utm_term=does+dunkin+donuts+use+flavored+syrup, was found embedded within the document, suggesting a phishing or malware delivery attempt. No scripts were extracted, but the presence of the malicious URL and the overall verdict strongly suggest a spearphishing attachment attack pattern.

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://jottigo.ru/strik?utm_term=does+dunkin+donuts+use+flavored+syrup PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414852/normal_5ff25e21117d4.pdfIn PDF document text
    • http://jumuzonogajal.iblogger.org/67912703543.pdfIn PDF document text
    • http://wiinorama.space/what_is_the_magna_carta_us_historyc8mvr.pdfIn PDF document text
    • http://allerlo.xyz/a_river_runs_through_it_book_free39497.pdfIn PDF document text
    • http://worldthailand.fun/jacques_maritain_libros6e9wm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488100/normal_5fd0670c889c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488817/normal_5fda27dc292b3.pdfIn PDF document text
    • http://fit-italy.space/pet_scan_diet3mtec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368955/normal_6008d4c3d98c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382638/normal_60014ab084325.pdfIn PDF document text
    • http://copyrightshelpcenter.com/43481668237wegoe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491723/normal_5fe1a787cdbad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/safiwezonavudu.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/ford_mustang_owners_forum_australia.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE534 5260 bytes
SHA-256: dcc5dfbfed8c2a217261a9b516bf6cec8d8a9212da6aa93bf57dfc091ef2eecd
font_01_sfnt_off0000f745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF745 11172 bytes
SHA-256: 9739bb08f6b60e0125c1270a20e47d4d5e2ebabded7d47fb4728401d417a5811