Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1dcffd12e9388ca…

MALICIOUS

PDF

82.9 KB Created: 2021-01-06 16:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 755ea88e2a71309f70ed596700729e37 SHA-1: 7f36b991ae52bb04096ba47139ad7f198120eca5 SHA-256: d1dcffd12e9388cae63f91e2e75aecb9a4cfdf7f9112b32ea96a9d31b5ef3b8c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to 'individual acting exercises'. The presence of an external URI indicates an attempt to redirect the user to a potentially malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/aws?utm_term=individual+acting+exercises+pdf PDF link annotation
    • https://cdn.sqhk.co/mujekesire/5woVYhg/grisaia_no_kajitsu_episode_3_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/vofaruvukuk/dQhebij/44600496288.pdfIn PDF document text
    • https://cdn.sqhk.co/kobamebexog/ghjh0he/wind_spinner_won_t_spin.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/jcSAghe/best_pocket_knives_with_clip.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/gdhgjai/electricity_meter_box.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mavixu/sage_50_accounts_v23_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/wovod.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/times_of_india_epaper_today.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/jagivotudapi.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/background_png_pic.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/94939443136.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/renaissance_periodization_diet_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/96357498647.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/printable_ascii_table.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/puvorebuwazi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DB 5160 bytes
SHA-256: 64f7977e1e8923403c6bc9dc8b43db7e71ea382ba8a9e08a5ca306e22697bc22
font_01_sfnt_off00010a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A77 11020 bytes
SHA-256: 64ff74a758f5180b817e731114b835e771801023471ec0d65d63de73b4579559
font_02_sfnt_off00012ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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