Malicious PDF — malware analysis report

Static analysis result for SHA-256 4716d21b2406549e…

MALICIOUS

PDF

79.9 KB Created: 2021-02-03 02:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6858ca116b99629610ebc93b524402f3 SHA-1: 317727b60a1331230ee3c0ccf9b574a70dbf0161 SHA-256: 4716d21b2406549e4076fe4ab537300aa7801877a30bd2c74df532a551e6ff14
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution scheme, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://seumenha.ru/aws?utm_term=pictograph+worksheets+printable PDF link annotation
    • http://gatorama.space/40329864655h44go.pdfIn PDF document text
    • https://tukadivi.weebly.com/uploads/1/3/2/6/132695248/vuluxodujezikajizoki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454971/normal_600480fbd414d.pdfIn PDF document text
    • https://subutadenurafo.weebly.com/uploads/1/3/4/5/134581349/kagafujejunakifa.pdfIn PDF document text
    • https://moduruwili.weebly.com/uploads/1/3/2/7/132710657/4939481.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/6635052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_601046bbcdb3b.pdfIn PDF document text
    • http://bamimutekinawaz.22web.org/vewutexikejutatin.pdfIn PDF document text
    • http://copalofa.site/8013301356ir1pi.pdfIn PDF document text
    • http://masito.space/krups_ice_cream_maker_user_manual802bq.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/xinugegitosilipog.pdfIn PDF document text
    • https://poxemitiwafu.weebly.com/uploads/1/3/1/8/131871555/mizebusare.pdfIn PDF document text
    • https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/1624721.pdfIn PDF document text
    • http://fivogudog.iblogger.org/college_panda_sat_math.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
    • http://lojosikol.epizy.com/printable_bls_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/check_writer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/amor_amor_amor_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/duxiranolevifaki.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/lightning_returns_final_fantasy_xiii_quest_guide.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_off0000ed53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED53 5280 bytes
SHA-256: d1ac761821c761101f57e4c078d987990a8a6cbd21e257ae67cfc588d0834903
font_01_sfnt_off0000ff42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF42 10672 bytes
SHA-256: 07295c26fa394153c4e7d74334728d5f19f104d5790d22dc9badf31b5eb0a4f5
font_02_sfnt_off000123c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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