Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc0476141da003f…

MALICIOUS

PDF

79.1 KB Created: 2021-03-06 04:23:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ed7f2400884a7b6adf74f13a244bbdbf SHA-1: a34892a45b8c6ce88bde3e7225443566f0c30c83 SHA-256: abc0476141da003fb426c70e7cee0e5d1d52aba0ac48715afb842f0ef31debaf
214 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of phishing or scam activity. The document body, though heavily obfuscated, appears to be a lure related to pairing Bose headsets. The presence of numerous external PDF links, many pointing to S3 buckets, suggests a link farm used to obscure the malicious redirector. ClamAV and ML classifiers also flagged this file as malicious.

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/123?utm_term=how+to+pair+my+bose+headset In PDF document text
    • http://nopotaz.medianewsonline.com/75279310641.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/jnCdxoy/deruvikareluzamiz.pdfIn PDF document text
    • https://cdn.sqhk.co/zezofajanaf/chc9hav/evolution_definition_sciencedaily.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/nijosinizo/my_dearest_lizzy_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b0feaba-02d9-4250-acdf-f26f2ac29210/olympus_om_lens_lineup.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/agamben_taste.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/cancion_infantil_el_uno_es_un_palito.pdfIn PDF document text
    • http://padegijogul.atwebpages.com/19727990057.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/7081149351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b74d85f8-1965-4111-ab74-a3f352a8c4ed/how_to_program_my_comcast_xr2_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/ielts_speaking_general_questions.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/dasivivido.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/wazokajolopakiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5176117b-7bc7-4515-8011-34c26c13e544/how_to_fix_auger_on_pellet_stove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d2efd81-dac3-4c32-b489-c7436a93aeb7/las_parabolas_de_jesus_lista.pdfIn PDF document text
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_e7e311791a0042f19e83e1bc2185224d.pdf?index=trueIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_802de4fb60e2454da06d075fca24ea3c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/android_emulator_lite_for_windows_10.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_off0000ea8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8C 5144 bytes
SHA-256: 7629a99d75cac318fefae8b2b004326667f9c256525e9448b2b3e72c2a853538
font_01_sfnt_off0000fc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC15 10808 bytes
SHA-256: 1b354eb5a7651af6018ff26dab4b71c5cb31096541af7d126f64f045b5488f15
font_02_sfnt_off00012109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12109 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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