Malicious PDF — malware analysis report

Static analysis result for SHA-256 4adee68ad83ae7b0…

MALICIOUS

PDF

78.1 KB Created: 2020-10-26 14:19:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3e36392fd15fa4c31253e144877d0093 SHA-1: 8937bc6520e5fba96988436b06c623d078eefa54 SHA-256: 4adee68ad83ae7b09b77d431a3bab9e0afe3f6ee50dba8537cfae9170e88244d
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a link to a redirector, which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Ms access 2020 programming pdf' and a URL that appears to be part of a link farm designed to attract users searching for specific documents. This, combined with the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic, strongly suggests an advance-fee scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://ttraff.cc/123?keyword=ms+access+2020+programming+pdf In PDF document text
    • https://xonunomimir.weebly.com/uploads/1/3/2/6/132681278/9945563.pdfIn PDF document text
    • https://sofivowipaduru.weebly.com/uploads/1/3/4/4/134454637/velejizepoguvix.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/6426361.pdfIn PDF document text
    • https://farupixin.weebly.com/uploads/1/3/4/3/134314126/1757712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376849/normal_5f8e1180867c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417815/normal_5f964933a1f93.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/mibiwivanetuj/sql_join_query_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/zurupobuxisapepobifoko.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/burazupin.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/zobedebigil.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/9459400434.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/agents_of_socialization.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/sixth_sense_technology_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3392fd0-2668-4bf1-b164-53ea98ed7dda/tebajupozesozosalafap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21da13a-f50a-4c51-a155-97c4e94fa1de/java_concepts_early_objects_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ea31f0-3c48-49ca-979b-3f3a4c994b13/7185865422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb64491-2358-4cf8-a99d-cac3830a83ec/35593995484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/498ae283-f3e6-4623-96db-e737168f0649/34610487144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b26cf2c6-78db-4dd5-bc7d-0b049460dc9d/47560615907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/921d548f-d285-4e01-89da-36ee4a9a1089/liwagogipivuvuwolik.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31C 5720 bytes
SHA-256: 7844c8c96c0c03a307ce9a688494c44b768351aab7fb217820af7c06e80e9ef9
font_01_sfnt_off00010678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 10588 bytes
SHA-256: c437c454b99712a0091614182159a73d37863305e9e50c9dcaa05ef56579cc67

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