Malicious PDF — malware analysis report

Static analysis result for SHA-256 0967e186ae10e232…

MALICIOUS

PDF

77.3 KB Created: 2021-04-28 08:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e73f9b0ad73dda9a40e8d4acb32b03ab SHA-1: b81bf38a3f55d37aaa39e048381eea20e2a21c6a SHA-256: 0967e186ae10e232e5644b574abcc70bd0787312b39d1a5ea42df371d4d9a97a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=american+politics+today+7th+edition PDF link annotation
    • http://jaliwif.22web.org/good_aa_topics_for_meetings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_6043e5329bbba.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/sazavibete.pdfIn PDF document text
    • https://xipazodi.weebly.com/uploads/1/3/4/3/134375507/4713810.pdfIn PDF document text
    • http://muvezada.iblogger.org/tifanubaruzaguwesakafu.pdfIn PDF document text
    • https://xororowikaluna.weebly.com/uploads/1/3/4/6/134643421/6f4f342.pdfIn PDF document text
    • http://nagetav.22web.org/rosogusipitafesuv.pdfIn PDF document text
    • https://ratisatemapabuz.weebly.com/uploads/1/3/1/3/131398591/92355b2.pdfIn PDF document text
    • https://pisusafinado.weebly.com/uploads/1/3/4/3/134363103/568605e.pdfIn PDF document text
    • http://fetidasobi.iblogger.org/le_journal_el_khabar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445879/normal_6064e9558463f.pdfIn PDF document text
    • http://xabigaxen.22web.org/verizon_router_default_ip_address.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://tasowivi.epizy.com/77853507731.pdfIn PDF document text
    • http://gomirisepu.epizy.com/girekenumalat.pdfIn PDF document text
    • http://demajipo.rf.gd/toxakijev.pdfIn PDF document text
    • http://ruzizoxotawuva.epizy.com/44016859272.pdfIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_5bf0793faf824b368a66a2419ef17819.pdf?index=trueIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_d2b257c79195467690b99597b541c2f3.pdf?index=trueIn PDF document text
    • http://rugokabiko.epizy.com/46561810959.pdfIn PDF document text
    • https://976edc35-935c-46de-9e6e-e225dbc25668.filesusr.com/ugd/0829d8_fb877541e77e4c8cbdd2e6737fb59eb2.pdf?index=trueIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_cbf6bc083c47441689ac1507d902ce1d.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD14 5272 bytes
SHA-256: e17c2bc7342e69d5d64f69a8781061a681ff826864c1583179b2da360302e065
font_01_sfnt_off0000deca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 10404 bytes
SHA-256: 3e9db8f1c95a04c9cd12de606d79539224eec8a4cc09cb32ff18dd20cbdabeaa
font_02_sfnt_off000102b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B8 16084 bytes
SHA-256: 29b8095464fa9501f2379a4c43ca3ba1b1df604f87f2abcbe11fa9bdafb8ec10
font_03_sfnt_off0001176f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c