Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4429c5cf17a9587…

MALICIOUS

PDF

43.8 KB Created: 2020-11-03 02:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 14290de3eb72eac8c9892fa3d80ea7f9 SHA-1: 1f3001e0a3a296be0916665dabe5e7ac41c3624b SHA-256: e4429c5cf17a95874562430e58275f1df2921513995575dfdb63c4880bc1791d
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and are likely part of an SEO spam or phishing campaign. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a malicious intent to redirect users to harmful sites. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a product search.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.ru/123?keyword=lg+lg+dp132h+all+multi+region+free+dvd+player In PDF document text
    • https://nimewoguvinu.weebly.com/uploads/1/3/4/4/134433183/potosawonefelatepob.pdfIn PDF document text
    • https://wifajeru.weebly.com/uploads/1/3/4/3/134342489/mulawawegota.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/sofud-vujafobaxoga-posabiwixafe.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/4242190.pdfIn PDF document text
    • https://lemoxubasox.weebly.com/uploads/1/3/4/3/134329143/wijolunerod-radido.pdfIn PDF document text
    • https://rawewefugu.weebly.com/uploads/1/3/4/3/134394717/226c439802b7f2.pdfIn PDF document text
    • https://pujatimosu.weebly.com/uploads/1/3/2/6/132681823/jifolotaj.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/likukilej-megomed-sizujem.pdfIn PDF document text
    • https://panujiwawavila.weebly.com/uploads/1/3/4/4/134457592/d7c1e09e0.pdfIn PDF document text
    • https://maguduvogusimog.weebly.com/uploads/1/3/4/5/134583052/4cdb5063c31.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/390b4818-d264-43df-8c89-8f6c9d3d6888/40117369545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5fd2547-29dc-4151-8e35-0c990b34c3d7/sulekefuvojone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ce495a-e297-4041-a9cc-af30e1b40970/98285287100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a64be3-c383-41dd-8869-b1a933b363ea/71134686072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e04e7595-387e-40fd-8c13-e9166578742b/rosovotajewirit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67881bb9-37fb-4dc2-8349-19cff10b026a/16832643183.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_off00006c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C20 5728 bytes
SHA-256: b0810136de3ddefad39a5577952a119c8af1a90aefa61c8438bf456e1c61fcac
font_01_sfnt_off00007f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8F 10224 bytes
SHA-256: 05fd2f596199780db3a5b84d785c3806c30e32e22892fd7955fc4dda59e83b57

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