Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d66d3573886d77…

MALICIOUS

PDF

75.3 KB Created: 2021-03-28 16:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4b36168d903a3e13dc1cb36fbc2a2bfc SHA-1: 133a8f057f839564e49f9bd0cfae8493aa9321ec SHA-256: d0d66d3573886d77cd55ff0db1fc50ec2b17597e0c1a77196b27c36eff94892c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jottigo.ru/123?utm_term=assamese+song++video+2018 PDF link annotation
    • http://sale50.pro/67325393698w59zs.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/cadena_de_coros_pentecostales.pdfIn PDF document text
    • http://lusolakidareve.mywebcommunity.org/how_to_crochet_a_small_dog_sweater_easy.pdfIn PDF document text
    • http://jopkapopka.online/371454134540hv6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ec3699-7c2a-4cd4-806a-8f9f6311f2f2/38601951132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/847e2b48-c007-4b9c-a5d8-9c759fb9abcd/why_is_my_frigidaire_electric_oven_not_heating_up.pdfIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_846b982e10584088b555f2e29a4fabdb.pdf?index=trueIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_6cad7d2f9d2847c0b34270826ff3afb8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/daaa3387-2170-4782-a0ca-0b42d126265a/96240016819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee33343-c812-4f55-a8eb-b50a2e2e708d/garmin_forerunner_410_replacement_strap.pdfIn PDF document text
    • https://827a6da4-a69c-4806-aaaa-db522494bc4d.filesusr.com/ugd/cb5916_fc8f986bdeaf47d09a11bc40fb48aa50.pdf?index=trueIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_1695d04fcdf24310b03cbdf1cb019b30.pdf?index=trueIn PDF document text
    • http://rikaxusajojoba.epizy.com/41298369776.pdfIn PDF document text
    • http://posufimiru.rf.gd/in_case_of_emergency_excel_template.pdfIn PDF document text
    • http://buletamapa.rf.gd/how_do_i_fix_my_electric_fan_not_spinning.pdfIn PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_f87e69452a1a4ad4b49c41fed991bc8a.pdf?index=trueIn PDF document text
    • http://murakuxun.epizy.com/kezedonetixuribazaso.pdfIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_cf9bc1ec57264780b8ebfe7603d65223.pdf?index=trueIn PDF document text
    • http://rozipiliwune.epizy.com/accurate_credit_report_sites.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_off0000e567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE567 5588 bytes
SHA-256: 1459c9f2a28cfb002044378c325b6cbdddf94916bb215bddbf5b1d148b5d5db6
font_01_sfnt_off0000f869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF869 11764 bytes
SHA-256: 9ea49fe9d1b1b21a3561300aaad2db495b1c124c98e5acc14c10e96f449a56ef

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