Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0c9d6a0f648ce6…

MALICIOUS

PDF

63.5 KB Created: 2020-10-17 07:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7cadcad7658fe27f2a456fd90534d81e SHA-1: b0e4fddb707de267daa3e07c7384bb155a2f2280 SHA-256: fd0c9d6a0f648ce6385eb1824e18dd61f37faef4884b7da1949c5e2eca292446
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a large number of embedded links, many hosted on disposable domains, and a critical heuristic firing for malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic. The 'SE_SECRET_RECOVERY_LURE' heuristic indicates the document is designed to trick users into revealing sensitive recovery information, likely to facilitate credential theft or financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=wpa_supplicant+conf+android+app In PDF document text
    • https://lifagixuwemup.weebly.com/uploads/1/3/0/9/130969738/wubarewoni.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/a63fb.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/5883350.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f876147a59fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f8a64f60b8f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f8a677fa457a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f8878a4e60ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5f895afd019ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f8a5ff650d2e.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/barasubolu_delawarowewolez.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/9b924f.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/87b1292.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/zofosowoz-dijewejelenub-joditoxu-kukowizutus.pdfIn PDF document text
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/rugimeda_revoxuk_subafuxa_xenofe.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/zopezoz.pdfIn PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/riwuzemapepawed_pobibatas.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/9cc70779-27c5-49b5-a89c-18cb6a4e3a39/colin_drury_6th_edition_free_dow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbf45142-e94a-4d52-a81e-9b41624008b1/tailand_bbc_weather.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56a3343-72f6-451a-9ec6-53a10add53ed/56735360287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f0d0f9-a9ea-4ff6-b278-d7f6c8f86670/63481467628.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_off0000ae07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE07 5192 bytes
SHA-256: 29428490b87b3475fc9df27e2473b7ad5b0fa96b022315e9c37bf5c6f1055397
font_01_sfnt_off0000bfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD3 15560 bytes
SHA-256: 6078bae79a58c319e677a2e859045158b77ed0a745235644365ab0ffb02dbc7c