Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b63515654b015ef…

MALICIOUS

PDF

70.2 KB Created: 2021-03-25 03:22:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d8194a9097ae90c74fe9011b51c5d168 SHA-1: d200fc14d85bcbf8fa86560c52f7e82c08b6d58e SHA-256: 2b63515654b015efed46d15345ef717e68d6b35cd7bc8fa0bbaddf53b0ab396b
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to 'Briggs and Stratton standby generator parts', likely intended to drive traffic to the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://gimoguvi.ru/wix?keyword=briggs+and+stratton+standby+generator+parts PDF link annotation
    • https://cdn.sqhk.co/wenisuvuroju/Wgjgfih/mogijuvikuzunagusenomikod.pdfIn PDF document text
    • https://cdn.sqhk.co/siboxowimu/ijjaDgi/pobimuparu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447915/normal_601baa3868fe7.pdfIn PDF document text
    • https://cdn.sqhk.co/keximovib/bhevggz/island_of_adventures_vs_universal_studios.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/eHBgejg/pazerolowaloko.pdfIn PDF document text
    • https://cdn.sqhk.co/pelebitebi/widujjb/drive_and_park.pdfIn PDF document text
    • https://cdn.sqhk.co/muwitajo/61idUek/rexudasanu.pdfIn PDF document text
    • https://cdn.sqhk.co/dolavalof/dtjcRgj/griswold_cast_iron_pans.pdfIn PDF document text
    • https://cdn.sqhk.co/jigotove/hgs5ijk/mortal_kombat_11_mileena_costume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486563/normal_5fd11a22ee884.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/ieHE2hg/4271449113.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/gfzjnVA/box_office_2020_weekend.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_aca44a773f774bf691cc8f0da243e232.pdf?index=trueIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_ae8b37fca24d429e8fdd8e67846804c1.pdf?index=trueIn PDF document text
    • https://c69a8150-bb1e-4c46-878b-fc1622391bd7.filesusr.com/ugd/cf91d6_29ccfc1429e7472b820d289cb1afc0cb.pdf?index=trueIn PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_661e90b8e3ae483e88d0f5d8f42b4aa8.pdf?index=trueIn PDF document text
    • https://9e2901ea-5d25-41a5-867c-54d0774c6e48.filesusr.com/ugd/4d0f37_7d4c54e0a3c948929752fd41a4772b89.pdf?index=trueIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_66a11391ade54dc08a60cb201fe8d348.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41B 5388 bytes
SHA-256: c019f3f8678ea5b92d53b5010d4ea776fc6be55044dc4b715b40766123e824c8
font_01_sfnt_off0000e67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67D 10860 bytes
SHA-256: b1456b57de91713d107b5c67bfc21857c3f95152aee87a2ac1085a8262c27727

Open this report in the interactive analyzer, or submit your own file for analysis.