Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1c98b22560f1e1…

MALICIOUS

PDF

82.8 KB Created: 2021-05-26 04:36:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: dcb6e9967360e5764ee01230eab91445 SHA-1: eac54a6bfbbecc3a7ef8de54dfe119d639418296 SHA-256: fe1c98b22560f1e173d445d8735c2ae178e1158287776a67a7262b6fe6a5e695
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, many hosted on disposable domains. The primary URL suggests a phishing lure related to keyboard backlight issues. While no scripts were explicitly extracted, the PDF structure and extensive external links indicate a malicious intent to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/strik?utm_term=why+is+my+keyboard+backlight+not+working PDF link annotation
    • https://novomegaweg.weebly.com/uploads/1/3/4/7/134738931/butagojolufufi.pdfIn PDF document text
    • https://varepanuror.weebly.com/uploads/1/3/5/3/135394497/dijuwekaxit_xepazusas_koxiv_wikig.pdfIn PDF document text
    • https://romarifekaxa.weebly.com/uploads/1/3/2/6/132683260/fagalukufaduse.pdfIn PDF document text
    • https://kunasituper.weebly.com/uploads/1/3/4/7/134765547/fasuja.pdfIn PDF document text
    • https://telarosiz.weebly.com/uploads/1/3/5/3/135318094/1f799d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_60215bcfdc863.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/matorurul.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/kobesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454999/normal_606a1dcf8c763.pdfIn PDF document text
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/wimitupovu-fefexap-xesubupe.pdfIn PDF document text
    • https://gufekesunix.weebly.com/uploads/1/3/4/8/134888283/2960875.pdfIn PDF document text
    • https://nimivakovi.weebly.com/uploads/1/3/2/3/132302999/lazok.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/vurefiv-femegi-rixoxokavidolo-robeta.pdfIn PDF document text
    • https://sonotipudo.weebly.com/uploads/1/3/4/3/134326760/jibifolifi-kadojikutire.pdfIn PDF document text
    • https://tukadivi.weebly.com/uploads/1/3/2/6/132695248/fuvorugafowemujaz.pdfIn PDF document text
    • https://rajitogo.weebly.com/uploads/1/3/4/3/134377965/bigema.pdfIn PDF document text
    • https://pilinasovoda.weebly.com/uploads/1/3/4/1/134132167/1f84c99377eed97.pdfIn PDF document text
    • https://worojipe.weebly.com/uploads/1/3/1/3/131382243/d9f2595bd4a.pdfIn PDF document text
    • https://nodepuje.weebly.com/uploads/1/3/4/5/134518199/9697568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_601e4b2355417.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/69192749253.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/viper_remote_start_installation_cost.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_off000103e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E9 5764 bytes
SHA-256: 7237626cfd08d0863e7f5f8035d9a19c8f21d74cae5705fed92e7cf93af3ff04
font_01_sfnt_off0001177f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177F 11268 bytes
SHA-256: a020c64c9bdd28dfa859462c5f8eee1f7cf9f6d6df8cef31826a0b9f3b9e2c44