Malicious PDF — malware analysis report

Static analysis result for SHA-256 6106eea4c6923eb1…

MALICIOUS

PDF

82.3 KB Created: 2021-04-13 11:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1035729170d3954b31b3e1ef550ac4d9 SHA-1: 5b3a421b8a0c78d54ef78f3e3f31a466da0b054f SHA-256: 6106eea4c6923eb186cd48502e1868313f67cba0ae22354203a4127a59515162
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a callback phishing lure. The document body, though heavily obfuscated, contains references to a URL that likely serves as a lure or part of a phishing campaign. The presence of embedded URLs and the heuristic firings strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://crophysi.ru/strik?utm_term=six+easy+pieces+essentials+of+physics+explained+by+its+most+brilliant+teacher+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460723/normal_600f16362a13c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388178/normal_5fc83593ae630.pdfIn PDF document text
    • http://vujivozopix.iblogger.org/76706466810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404285/normal_60373df5ba71f.pdfIn PDF document text
    • http://fimosabu.iblogger.org/asking_for_help_email_formal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_601dad3498833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486053/normal_5fdab38c3d920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_6019808beb3bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403270/normal_60131adf8bff6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475559/normal_6020af6ae991e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367668/normal_5ffd4558262b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445881/normal_6040f1e01fcf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482418/normal_60320ed7b721b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416919/normal_5fcb79c09814b.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/xakapudakadu/pejowudasaxaputu.pdfIn PDF document text
    • http://nototen.epizy.com/augmented_reality_multiplayer_games_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/pubeguketofize.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/how_full_is_your_bucket_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/8390698656.pdfIn PDF document text
    • http://vovivufevalo.rf.gd/stomach_loss_exercise_video.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/21559334147.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/arnold_chiari_malformation_surgery_recovery_time.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/47079254418.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10198 5808 bytes
SHA-256: 60d1f5d5e21d351981e63f8b8954d1c3f78a3cf37ab7a46197f36f80cb46f918
font_01_sfnt_off0001153c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153C 11160 bytes
SHA-256: f615996896882a03b4a0f3ebeaf5717afd1f9a8be1ebb06e6b0c04f34b822536

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