Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b247852bdbc5a4…

MALICIOUS

PDF

72.3 KB Created: 2021-02-08 03:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 621cac6fcbbd8c86ed5433126c96afa5 SHA-1: 1255c19f1622bd4e54eba7cd16efabced820a2a7 SHA-256: c7b247852bdbc5a41c14eb8dbd4e19c30e57101e103c032f923930da1cd46123
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'https://bologen.ru/123?utm_term=f10+code+on+frigidaire+wall+oven', which is likely part of a phishing or social engineering scheme. The document body, though heavily obfuscated, suggests a lure related to appliance codes, further supporting a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=f10+code+on+frigidaire+wall+oven PDF link annotation
    • http://mestorating.ru/42609613053vbbmw.pdfIn PDF document text
    • http://mafaregasinuviv.22web.org/ravajonakanem.pdfIn PDF document text
    • https://kuvikupomudu.weebly.com/uploads/1/3/4/4/134457818/tumaleregonod-timelu-gaburivotijusad.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/jaXrTjb/racing_experience_atlanta.pdfIn PDF document text
    • https://cdn.sqhk.co/xagunetoxa/f3zyUuL/syfy_films_list.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/0Tihigc/73724146512.pdfIn PDF document text
    • http://lowuwirakob.66ghz.com/exponential_graphs_worksheet_tes.pdfIn PDF document text
    • https://cdn.sqhk.co/kugugofawaz/hhcYjed/49701986478.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/fogibi/90811439323.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/duke_energy_florida_outage_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/brtten_nete_kira_hesaplama_forml.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/dinenukak.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/venue_hire_enquiry_email_template.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_off0000dc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC96 5312 bytes
SHA-256: 0ad05cdd91f0a2dd9cbc306e6ca203f9e0f9662e8eb87b4854b5afac0e26a53d
font_01_sfnt_off0000eeda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDA 10984 bytes
SHA-256: 466d9cf11c135236ab3af4682176acdc38a2e6ef3e80f9778111c11a727a5ab7

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