Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1edd8ea4497ebd…

MALICIOUS

PDF

72.7 KB Created: 2021-03-17 09:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7ef7c7070cdb4eaadbce97c096006acd SHA-1: 086a5a0b2da5952257d148e8fd7400260c764a81 SHA-256: 1d1edd8ea4497ebde320a0f95a8c1dfebe83f8c96aeba9f3587ac3a5d7178604
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains keywords related to 'Millermatic 135 welder parts', suggesting a phishing or scam lure. The presence of numerous links on disposable hosting further supports a malicious intent, likely to distribute further malware or phishing content.

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 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.
  • 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://yafferge.ru/strik?utm_term=millermatic+135+welder+parts In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5fd2836aefe5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460981/normal_604706d00b212.pdfIn PDF document text
    • http://domavera.ru/dagobusarevetebirwv3hn.pdfIn PDF document text
    • http://esmoney.site/strategic_management_process_in_orderk01e3.pdfIn PDF document text
    • http://chambreop.xyz/how_much_does_the_nordictrack_fs7i_weight99z90.pdfIn PDF document text
    • http://trelon.fun/566509198705l6jt.pdfIn PDF document text
    • http://baxijemapuzoxu.22web.org/why_is_tennis_better_than_other_sports.pdfIn PDF document text
    • http://biomanua.website/how_do_you_make_iceberg_slime_recipeiw70s.pdfIn PDF document text
    • http://guitar.su/digital_design_subwoofer_18kmhk9.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://vilewol.epizy.com/adding_decimals_worksheets_grade_5.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_9f5e09ecbe8946929e8662edf7041fb8.pdf?index=trueIn PDF document text
    • http://liwapoguxuwuzir.epizy.com/how_to_reset_maintenance_box_epson_l6160.pdfIn PDF document text
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_b7587e63a29649cd97ba7703e911eb8c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/tusigodanov.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/54864167224.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_off0000ccad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAD 5228 bytes
SHA-256: 674d16a7c67523160f8de4de590239666e9a3411b45524d42ad6461344db0a97
font_01_sfnt_off0000de88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE88 11800 bytes
SHA-256: 0041153f3030a4a7291cc3172596146103a64cc09b3493e07372b7f20e92d166
font_02_sfnt_off00010686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10686 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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