Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbac47f135e0e944…

MALICIOUS

PDF

64.8 KB Created: 2021-02-03 19:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0eca12e5d8b2555b78b574c189386631 SHA-1: 9daa48316f319a4821b863428f182bc073e63353 SHA-256: bbac47f135e0e94460a270183a9e4294fa2a330128a386b9e5fa0066bdc49fbc
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a redirector link to 'crophysi.ru'. This URL, along with others pointing to PDF files, suggests a phishing or SEO poisoning attack aimed at directing users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/wb?keyword=houghton%20mifflin%20spelling%20grade%205%20answers In PDF document text
    • https://sodikisug.weebly.com/uploads/1/3/1/4/131437766/terukaniz_numevipob.pdfIn PDF document text
    • http://idealica-italiauficiale.website/5_cm_per_second_soundtrackwpz5g.pdfIn PDF document text
    • https://gabodubelekopo.weebly.com/uploads/1/3/4/3/134356924/futapibopevalu.pdfIn PDF document text
    • https://bumovewadenol.weebly.com/uploads/1/3/5/3/135318567/4d966918.pdfIn PDF document text
    • https://daxixulo.weebly.com/uploads/1/3/1/0/131070202/1681718.pdfIn PDF document text
    • https://mozesejute.weebly.com/uploads/1/3/1/3/131380505/1312472.pdfIn PDF document text
    • https://mufixedak.weebly.com/uploads/1/3/4/6/134602267/tixovujug.pdfIn PDF document text
    • https://bozixezexa.weebly.com/uploads/1/3/4/8/134861503/12cfb2185.pdfIn PDF document text
    • https://teribupugabi.weebly.com/uploads/1/3/4/8/134852699/8091902.pdfIn PDF document text
    • https://fataleripe.weebly.com/uploads/1/3/0/9/130969718/sawudiladoli_luwerig.pdfIn PDF document text
    • http://itprod.space/sebik51xuh.pdfIn PDF document text
    • http://biweekamnf.com/50_states_song_lyrics6nsjh.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/legipalofi/aba_english_apk_premium_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/bujekibonozepizamogifo.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/70896229990.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/8940073189.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/tixulote.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/evaluating_variable_expressions.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/haloalkanes_and_haloarenes_objective_questions.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_off0000c146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC146 5632 bytes
SHA-256: 7546cfa71a7ea7df335d970af4b1975d4296a94e2ac5ce9d02052549959ecf53
font_01_sfnt_off0000d459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD459 9812 bytes
SHA-256: f325109a2817c171b02da219cd3f025e9fb42d8cb083bd28a5b5adb9a7d68207

Open this report in the interactive analyzer, or submit your own file for analysis.