Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fa6098408c78d1…

MALICIOUS

PDF

77.7 KB Created: 2021-06-07 12:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a78b7bc7147a468a5931e8a4c47b2fed SHA-1: b68dbe568158dab58156ab8f09720a965ae944a9 SHA-256: e2fa6098408c78d173d0b8d4acfae3bd9a8fc02228cd7fa23d60ff59b1d78ae5
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly indicate an attempt to lure users to external sites, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://baarspo.ru/123?utm_term=mathematics+10+module+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371509/normal_5ffbb07c2cb0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459320/normal_602f127384e65.pdfIn PDF document text
    • https://pamokevavazodo.weebly.com/uploads/1/3/4/3/134386981/0b4e9.pdfIn PDF document text
    • https://rozutawupev.weebly.com/uploads/1/3/2/6/132695629/fewetozas_logatovusoxuvog_viwatirodavina_lisekejovopidol.pdfIn PDF document text
    • https://tilivugex.weebly.com/uploads/1/3/4/1/134108965/fogakoza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_6019b4e927a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446273/normal_5fd6c3b00c250.pdfIn PDF document text
    • https://viluxesoxumubi.weebly.com/uploads/1/3/1/4/131406714/dudib_devufiritu.pdfIn PDF document text
    • https://xutepodufolesik.weebly.com/uploads/1/3/0/7/130739265/zevaxibisifagev_poviwim_pupez_nawapuma.pdfIn PDF document text
    • https://xarojitoma.weebly.com/uploads/1/3/5/3/135305856/9384668.pdfIn PDF document text
    • https://dirujewe.weebly.com/uploads/1/3/4/6/134677456/7c5b1101df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458622/normal_604e30cbb471d.pdfIn PDF document text
    • https://zajoxewamabovi.weebly.com/uploads/1/3/7/5/137503144/7305163.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/82733150-4ab0-4c38-b35a-0bce836d7b11/80755367672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63f28ca3-f915-43bc-97c1-691fe42d24be/citizen_eco_drive_1_1000_sec_wr200_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a66438-464c-4f1c-b7e6-3b2be21605c1/nugujutagesaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c58a31-ab49-4d7a-8cac-32072856bde3/harry_potter_und_der_stein_der_weisen_filmfehler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b03676f-d437-4278-939a-fa6f097b3ca6/22708315588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e66f7dc-a3ad-44b9-81d0-5b671262a7b2/where_is_the_filter_located_on_a_ge_dishwasher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c86b3d37-f40f-4a9c-9fc0-e9fb3371f82f/how_to_fix_tablet_charger_port.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ce1fa8-93ce-4037-b878-7616d52e31a7/24726395633.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_off0000f16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 5496 bytes
SHA-256: 47e94fb778bfb6e7569501031b2b429926e71ed3e0dcef7bb42a34e249772d5a
font_01_sfnt_off0001040e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040E 10960 bytes
SHA-256: a0da731145c8f4ee550a06b01eed638fd0af72039ee38259b78c45ea3d23964a