Malicious PDF — malware analysis report

Static analysis result for SHA-256 8034cb95abd94348…

MALICIOUS

PDF

111.1 KB Created: 2021-03-10 01:01:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dd00d9dd30a964eee4df4145344e7d02 SHA-1: 4fc8a17f8f01b200688bfdb4bcc7ad75038902d4 SHA-256: 8034cb95abd9434814315f3667b51a936ea372e7f4799bf5a9dbd3cbf563f0ba
126 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, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a decoy, with the primary malicious intent likely residing in the embedded links and the overall structure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/strik?utm_term=types+of+spatial+structure+in+narrative PDF link annotation
    • http://missunik.space/53774473952x6zx6.pdfIn PDF document text
    • http://xidijisuf.22web.org/interrogative_sentence_example_worksheets.pdfIn PDF document text
    • http://mpvideo.org/5841085389325yi2.pdfIn PDF document text
    • http://specialsale.info/4293977311c0jsq.pdfIn PDF document text
    • http://info-pages.ru/sig_sauer_p238_emperor_scorpion_reviewrlt4k.pdfIn PDF document text
    • http://hocostyle.ru/lejaluxans856b.pdfIn PDF document text
    • http://sovetnik53.ru/genomed19rn.pdfIn PDF document text
    • http://tryadasert.online/lonigaxawugunisoguxutetfcbqb.pdfIn PDF document text
    • http://4d-5d.com/90323473478g5281.pdfIn PDF document text
    • http://safodimim.iblogger.org/lizardmen_guide_steam.pdfIn PDF document text
    • http://pezamuxajezupe.iblogger.org/15827745260.pdfIn PDF document text
    • http://repair-monokoles.ru/mta_the_bronx_ny_10473c2jte.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_dfacae79d0ba40b58125c151a9eb672b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/akg_y50_user_manual.pdfIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_cac7b33e563042d89419f86fbdfba23b.pdf?index=trueIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_dab5411bbf344a19867b3234b4e9830b.pdf?index=trueIn PDF document text
    • http://newosanovaf.epizy.com/30893967012.pdfIn PDF document text
    • http://kepirodineloga.epizy.com/aishwarya_rai_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/xilagonugojegavu.pdfIn PDF document text
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_4553d85ab70c4155afdd6c264111fdd1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/zoom_h4n_pro_mic_quality.pdfIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_d6f7224631e544d790ef0804eb029ef8.pdf?index=trueIn 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_off0001778b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1778B 5120 bytes
SHA-256: bce88a0205274426e51caa28ac85dbf40f80ea902e9c5f467c21ea94bff41988
font_01_sfnt_off00018917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18917 11396 bytes
SHA-256: 2a3d6b0ba6b76455514058ae8765572ff52d7de63a3d9668fc05301d361a083e

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