Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa3c515cbbc6504…

MALICIOUS

PDF

74.5 KB Created: 2021-03-07 17:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 00f4b0580805ced90058c8ae6b9d63e5 SHA-1: 506d1a178cb52782edb982349dfef084d4a9500d SHA-256: cfa3c515cbbc6504c282245666bacee796b8c73d0fec43f8adc610afe54a97f4
206 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to malicious content, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=garfield+county+warrant+search PDF link annotation
    • http://sayseedokg.com/toladinetegoneturw5bh.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/60124521030.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/painting_with_a_twist_type_places_near_me.pdfIn PDF document text
    • http://ellmax-site.xyz/92301809952l3foi.pdfIn PDF document text
    • https://nuwosalu.weebly.com/uploads/1/3/4/4/134497214/fenodoruju.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/92831026052.pdfIn PDF document text
    • http://opensol.xyz/jogevirugebukuwozavupojigqqmq8.pdfIn PDF document text
    • http://sopidemeleket.mygamesonline.org/craftsman_dgt_6000_specs.pdfIn PDF document text
    • http://zoom-omsk.ru/15085916821gr7ek.pdfIn PDF document text
    • https://repitosa.weebly.com/uploads/1/3/2/6/132681506/924089.pdfIn PDF document text
    • https://tojaxufuvubugo.weebly.com/uploads/1/3/4/6/134641466/4235915.pdfIn PDF document text
    • https://ruworelolovifuf.weebly.com/uploads/1/3/4/4/134462917/9946665.pdfIn PDF document text
    • http://nigma24invest.online/39733576121ygdst.pdfIn PDF document text
    • https://xogefuvoza.weebly.com/uploads/1/3/2/3/132303221/9930309.pdfIn PDF document text
    • http://normaa-id.com/cyberflix_tv_apk_firestick6p88l.pdfIn PDF document text
    • http://obzorov.site/mezileguvimclqs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_55811ff2878345beb1e4adeee066504c.pdf?index=trueIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_70a3bcb4f0e141959b5b7348ca2f7028.pdf?index=trueIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_2f92040ef40b4da483188df5ab7822e6.pdf?index=trueIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_56dc5f5da42e46c99320ed5339ff767b.pdf?index=trueIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_5fa3ac4e86fc4c1287f1d915d53279e7.pdf?index=trueIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_8044d1ca7c5b4530a1a7c98cc128d643.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE01 5336 bytes
SHA-256: fbcac16ccd7cbb44fdb27de9ac7f0b23d474e2eea015cf2aa94722b3702a5530
font_01_sfnt_off0000f03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 14428 bytes
SHA-256: 743467eaa856dbe5a3f0414a76b348f370dbee8c118ae2ce0c45b4633bb61de2