Malicious PDF — malware analysis report

Static analysis result for SHA-256 496d94410964794d…

MALICIOUS

PDF

81.2 KB Created: 2021-03-15 20:25:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0c79c37bbd5a712406a48bcb0d979fb2 SHA-1: 887457fdd149dcb3d47455e08bc78e05e5df5c7b SHA-256: 496d94410964794deb6851b9460b0878efbcf504a79a4e901558b581557b1c94
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to suspicious or unknown domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://pelibifir.ru/wix?keyword=race+for+the+double+helix+answers PDF link annotation
    • https://cdn.sqhk.co/sebixodof/jjid3AD/to_do_list_template.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/r5gghaS/blockchain_wallet_bitcoin_cash.pdfIn PDF document text
    • http://im-marceting.site/dark_blue_denim_jacket_womens_outfito48cl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384633/normal_5ffae93187558.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/526166477427736y.pdfIn PDF document text
    • http://bossyonlinex.com/desojosopufokunm2al3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_604a5eac1bad1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383579/normal_603018caca041.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/cRhd1fE/81106480719.pdfIn PDF document text
    • http://liketsven.xyz/gukirojezokirudarapidapv3.pdfIn PDF document text
    • http://mebelrostov.ru/19826978358is4bu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462046/normal_5fcea4f96d69b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5ff8a431a7d72.pdfIn PDF document text
    • http://prequester.online/86511253347yl0l2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_6024400e35bd5.pdfIn PDF document text
    • https://cdn.sqhk.co/pujimuxuja/jjjHPjc/34179581171.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367294/normal_6007a9fdee9c1.pdfIn PDF document text
    • https://cdn.sqhk.co/loxexafetivu/hBXwjdb/how_to_remove_fill_color_in_word_2010.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://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_82ef84a435d246c7a5c42a9f66025143.pdf?index=trueIn PDF document text
    • https://73099f28-10d5-4558-98a1-2f8dc61f1a2f.filesusr.com/ugd/f62eaa_9830386348a14edeac85f5f6c7050274.pdf?index=trueIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_f635edf814e942a09a6e17463da9e5a1.pdf?index=trueIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_1717124fc86e4fe2bba948d43b228175.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B1 5300 bytes
SHA-256: d88ef43deebea9fd67bc8ede99cb782b160c475db8501b72d3a28842a183c8fc
font_01_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 10736 bytes
SHA-256: 9fa08f625ce6e609b97494f71c46162772617cfe9ca2d689bdb1e806de9d8541
font_02_sfnt_off00012948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12948 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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